Cork cambium is formed by a process known as
Read the following statements, and select the correct option. A. Growth is accompanied by metabolic processes that occur at the expense of energy. B. When the rate of catabolism exceeds the rate of anabolism, growth occurs.
The given image represents
Identify the incorrect statement.
Typical growth curve in plants in natural environment is
Which of the following is not a consequence of using ethephon?
Which of the following did not arise due to regaining of specialisation by a meristematic cell?
Growth of pollen tube is measured in terms of
Dormin is structurally similar to which of the following? I. Inhibitor B II. Abscissin II III. Kinetin IV. Ethylene
The process of growth is maximum during :
When a defoliated short-day plant is exposed to light below the critical period
Plant growth is
The period of growth is generally divided into three phases, namely, meristematic, elongation and maturation. Identify the regions on the basis of following features: A. Cells increase in number and so does the size of vacuoles and new cell wall deposition. B. Cells are rich in protoplasm, large conspicuous nucleus, thin cellulosic cell wall with plasmodesmata connections. C. Cells attain their maximum sizes in terms of wall thickening and protoplasmic modification.
One of the following is not the influence of Cytokinins
One of the following is fruit ripening hormone
How many of the following auxins are obtained from plants? IAA, IBA, NAA, 2,4-D
Auxin was first isolated from:
Which of the following form of auxin is widely used in removing weeds?
Functions of auxin on plant body are: i- Apical dominance ii- Abscission iii- Growth of leaves iv- Bolting
Lateral shoot growth and adventitious shoot formation is promoted by the application of:
Identify the PGR responsible for the following changes given below. a- Horizontal growth of seedling b- Swelling of the axis c- Apical hook formation in dicot seedlings
Most intensively studied form of GA is:
Just prior to the reproductive phase, internodes elongate enormously causing a marked increase in stem height. This phenomenon is known as
Statement A: A hormonal substance is responsible for converting the vegetative shoot apex to flowering apex. Statement B: Hormonal substance responsible for the induction of flowering is synthesized in shoot apex.
Vernalization stimulates a subsequent photoperiodic flowering response in: a- Wheat b- Rye c- Sugarbeet d- Cabbage
Winter and spring varieties are seen in: a- Wheat b- Barley c- Rye
Match Column I with Column II and choose the correct match Column I Column II A Root initiation in stem cuttings i Zeatin B Root hair formation ii IAA C Bolting iii Ethylene D Adventitious shoot formation iv Gibberellins
Identify the correct statement w.r.t. vernalization.
Identify the incorrect statement.
An indole compound that controls xylem differentiation and helps in cell division was first isolated from
Which of the following hormone is most effective in fruit ripening?
Match Column I with Column II Column I Column II a. Charles Darwin and Francis Darwin i. Observed ribosomes under the electron microscope as dense particles. b. F.W. Went ii. Observed phototropism in the coleoptiles of canary grass to unilateral illumination. c. H.H. Cousins iii. Isolated auxin from tips of coleoptiles of oat seedlings. d. George Palade iv. Confirmed the release of a volatile substance from ripened oranges that hastened the ripening of stored unripened bananas.
Chloroplast formation is promoted by the influence of
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called
Role of the following phytohormones is antagonistic in terms of apical dominance.
Quantitative comparisons between the growth of the living system can be made in two ways : (i) Measurement and the comparison of total growth per unit time is called the ……… a …….. growth rate. (ii) The growth of the given system per unit time expressed on a common basis, e.g. : per unit initial parameter is called ……. b …… growth rate
A person wanted to create a lawn for his home garden, so he planted grass all over the area. He observed that many other weeds also growing in the garden. To remove that weeds what weedicide he should use?
During seed germination its stored food is mobilized by
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed?
Match Column-I with Column-II and select the correct option using codes given below. Column I Column II (a) Cytokinin (i) stimulates closure of stomata (b) Ethylene (ii) increases stem length (c) Gibberellin (iii) promotes lateral shoot growth (d) Abscisic acid (iv) found in large amount in tissues undergoing senescence
Internodal elongation prior to flowering in plants with rosette habit is promoted by the following phytohormone.
Arrange the following stages in a sequence during the developmental process in a plant cell. A. Cell Differentiation B. Plasmatic growth C. Cell maturation D. Cell expansion
Which of the following is used to overcome apical dominance?
Which of the following hormone induces parthenocarpy?
Formation of interfascicular cambium and cork cambium takes place by a process known as
The photosensitive pigment responsible for flowering is:
Formation of phellogen from parenchyma cells is
Read the following statements A. B. C, and D with respect to the physiological effects of gibberellins, and select the correct option having two correct statements. A. Gibberellin is used to speed up the malting process in the brewing industry. B. Spraying sugarcane crop with gibberellins increases the yield as much as 20 tons per acre. C. Gibberellins help overcome apical dominance. D. It promotes rapid internode/petiole elongation in deep water rice plants.
Choose the correct option for the given image.
First isolated cytokinin of plant origin is
Phototropic and geotropic response toward the source of stimulus in shoot and root tips, respectively, is due to
How many of the following statements are correct regarding the plant hormone ethylene? (a) Can cause internode and petiole elongation in deep water rice plants (b) Is involved in ripening of climacteric fruit (c) Induces flowering in mango (d) Is derived from t-RNA (e) Seed dormancy in peanut
Environmental heterophylly is observed in
Which one of the following pairs, is not correctly matched?
Identify the hormone responsible for healing wounds and removing stress in plants.
ABA is a derivative of:
Function of plant growth inhibitors is to:
‘Bakanae’ (foolish seedling) disease in rice is caused by:
Find out the incorrect statement about plant growth regulators.
N 6 -furfurlyamino purine is a derivative of:
Who crystalized cytokinins?
Discovery of which of the following hormones is an example of serendipity? a- Auxins b- Gibberellins c- Cytokinins d- Ethylene e- Abscisic acid
Which of the following is not a function of plant growth promoters?
Which of the following growth regulator belong to both the groups, i.e. promoters and inhibitors?
Cell enlargement, pattern formation and tropic growth are the functions belonging to which group of hormones?
Three different kinds of inhibitors purified and chemically characterized in mid-1960s were found to be chemically identical and named as:
Match the columns: Column I Column II (a) H.H. Cousins (i) Cytokinin (b) Miller and Skoog (ii) Gibberellin (c) F.W. Went (iii) Ethylene (d) Kurosawa (iv) Auxin
Who confirmed the release of volatile substances from ripened oranges that hastened the ripening of stored unripe bananas?
What is the meaning of word ‘Auxein’?
NAA stands for:
2,4-D stands for:
How many of the following auxins are synthetic in nature? IAA, IBA, NAA, 2, 4-D and 2, 4, 5-T
‘Agent orange’ used during Vietnam- US war is chemically:
Plant parts where auxin is usually produced:
Auxins help in production of parthenocarpic fruits in plants like: a- Tomato b- Banana c- Grapes d- Pomegranate
Which of the following method is used to increase yield in tea plantation?
Hormone responsible for preventing falling of young leaves, fruits and flowers is:
Which of the following hormone is responsible for bolting?
Identify false statement.
Gibberellins are chemically in nature.
Which of the following hormone is most effective in fruit ripening?
Which of the following PGR initiates germination in peanut seeds?
In order to hasten ripening in tomatoes and apples, they must be sprayed with:
Synchronization of fruit-set in pineapples is due to the influence of:
Division in cells at root and shoot apex represents which phase of plant growth?
The ability of plants to follow different pathways in response to environment or phases of life to form different kinds of structures is called:
Development in plants is controlled by the factors which are-
Increase in growth per unit time is called:
Choose the correct statement
Choose the incorrect statement
Which of the following is responsible for inducing dormancy in seeds?
Choose the incorrect statement.
During ripening of fruits, ethylene hormone raises the rate of respiration. This phenomenon is known as:
Due to the presence of meristems at certain locations in the plant body,
Which of the following plant hormone stimulates the closure of stomata?
Choose the plant growth regulator with herbicidal properties.
Some plants require the exposure to light for a period exceeding a well defined critical duration, these plants are
IAA was first isolated from
How does ethephon increases the yield of cucumber?
Which of the following doesn’t occur naturally?
Which of the following term defines the promotion of flowering at low temperature?
Which of the following defines the phenomenon of dedifferentiation?
Treatment of seeds at low temperature under moist conditions to break its dormancy is called
Parthenocarpic fruit cannot be produced by the application of
Typical growth curve in plants is
What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?
The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of
Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?
Meristematic tissue responsible for increase in girth of tree trunk is
Which one of the following growth regulators is known as ‘stress hormone’?
Auxin can be bioassayed by
Abscissic acid like influence on seed dormancy is shown by A. Gibberellins B. Para-ascorbic acid C. Phenolic acids C. Nitrites
The Avena curvature is used for bioassay of
Phytochrome is a
Fruit and leafdrop at early stages can be prevented by the application of
Choose the correct statement
What is the site of perception of photoperiod necessary for induction of flowering in plants?
Identify the correct sequence of appearance of various meristems in the development of a plant I. Intercalary meristems II. Cork cambium III. Apical meristems IV. Vascular cambium
Cytokinins have anti-auxin property in terms of
Growth of pollen tube is measured in terms of
Statement A: Ethylene increases the absorption of water and minerals from the soil Statement B: Ethylene promotes adventitious root formation.
Choose the incorrect match I. Indole derivatives – Auxins II. Terpenes – Cytokinins III. Carotenoid derivatives – Abscissic acid IV. Adenine derivatives – Gibberellins
Low or cold temperature perceiving part of plant for induction of flowering is
Plasticity influenced by environmental conditions is shown by heterophylly in
Choose the incorrect statement with respect to photoperiodism.
Growth of a plant organ with respect to its initial parameter in a given time is called
Match the following List – I List – II A) Formation of chloroplasts I) Cytokinin B) Early seed production in conifers II) ABA C) Initiation of flowering in Pineapple III) Gibberellins D) Seed development IV) Ethylene
During the growth of a root of dicot the final length is 18cm after a period of 3 days. The growth of root in every 12 hours is 2cm. What is the initial length of root at time zero?
Which of the following is not an inhibitory substance governing seed dormancy ?
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
Match the List I with List II and choose the correct match. List I List II A) Synergistic effect of cytokinins and auxins I) Swelling of shoot B) Individual effects of auxin II) Seed dormancy C) Individual effect of ABA III) Control of dicot weeds D) Individual effect of ethylene IV) Morphogenesis
Statement A: Yield of Cucumber is increased by the application of Ethylene as Ethephon. Statement B: Ethylene promotes the formation of more male flowers.
Which of the following phytohormones is most commonly used in a crop plant whose terminal buds are modified into tendrils to increase the production of its fruits?
Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
Match the following (a) Aquaporin (i) Amide (b) Asparagine (ii) Polysaccharide (c) Abscisic acid (iii) Polypeptide (d) Chitin (iv) Carotenoids Select the correct option
Match the following concerning the activity/ function and the phytohormone involved. (a) Fruit ripener (i) Abscisic acid (b) Herbicide (ii) GA 3 (c) Bolting agent (iii) 2, 4-D (d) Stress hormone (iv) Ethephon Select the correct option from following
Who coined the term ‘Kinetin’?
Removal of shoot tips is a very useful technique to boost the production of tea-leaves. This is because
Growth hormone Auxin was isolated by F.W. Went from tips of seedling coleoptile of :
Statement P: A meristem can give rise cells/tissues having different structures at maturity. Statement Q: Vascular cambium forms cells towards interior of axis that mature to transport mineral and water and those cells formed towards the periphery mature to transport organic food materials.
Choose the incorrect statement.
Structures of dicot root that can dedifferentiate during normal secondary growth are A. Pericycle B. Conjunctive tissue C. Endodermis D. Cortex
Seed dormancy due to seed coat barrier can be broken by
In most of the situations Abscissic acid acts against the following phytohormone.
All are methods of overcoming seed dormancy except
Which plant growth regulator helps in promoting female flowers in cucumbers?
Which hormone promotes rapid internode/petiole elongation in deep water rice plant?
Bioassay for gibberellin is:
Phytohormone used to increase the stalk length in grapes and inducing early maturity in juvenile conifers also shows the following influence.
Identify the chemical nature of cytokinins.
Abscisic acid is called a stress hormone because:
The ability of parenchyma cells regaining meristematic activity and forming a secondary meristem is called
Choose the features of arithmetic growth. A. Only one daughter cell continues to divide, while the other differentiates and matures. B. Initially the growth is slow and then increases rapidly. C. A linear curve is obtained when graph is plotted time against growth.
Which of the following activity in plants is promoted by gibberellins?
Plant hormone responsible for inhibition of metabolism is
Auxins were isolated from the coleoptiles of Oats by
Statement A: Sugarbeet, cabbage and carrots are monocarpic plants. Statement B: Biennials require both cold treatment or vernalization and subsequent exposure to certain photoperiod for induction of flowering.
Read the following statement with respect to measurement of growth. (a) Growth can be measured by an increase in length and diameter only. (b) With the help of length, growth of pollen tube is measured. (c) Cells in a watermelon may increase by up to 3,50,000 times. (d) A single maize apical meristem can give rise to more than 17,500 new cells per hour, (e) An increase in surface area denotes the growth of dorsiventral leaf. How many of above given statements are correct?
Presence of most of the tissues and cell types represent the following phase of root or shoot apex.
How many of the following are the products of redifferentiation? phellogen, phellem, phelloderm, interfascicular cambium, secondary xylem, secondary phloem, primary xylem, procambium, complementary cells
Steps involved in the course of seed germination are (a) Emergence of radicle (b) Hypocotyl straightens (c) Imbibition of water (d) Formation of hypocotyl hook
Match the following. Column I Column I I (a) IAA (i) Overcoming genetic dwarfing (b) GA. (ii) Most widely used PGR in agriculture (c ) Cytokinin. (iii) Induced parthenocarpy in tomato (d) Ethylene (iv) coconut milk factor
How many of the following terms are associated with stress hormone? Terpene derivative, dormin, bolting, Richmond-Lang effect, seed dormancy, anti-GA, break dormancy
The hormone that was first isolated from human urine was
The PGR that induces seed and bud dormancy is
Find the incorrectly matched pair.
The hormone which was discovered through “foolish seedling disease” of rice is
Which of the following are described as growth promoting phytohormones? a. ABA b. IAA c. GA 3 d. IBA
The site of perception of light/dark duration are:
The plant growth regulator that has been used extensively in agricultural and horticultural practices and also helps to initiate rooting in stem cuttings is also responsible for:
These hormones show antagonistic influence in terms of seed dormancy.
In a dormant seed, growth is
Which of the following hormone promotes bolting in plants?
I- Breaking seed and bud dormancy II- Promoting Sprouting of potato tubers Above mentioned functions are related to
Read the following statements- A: During the development of a mature plant from a zygote, there is a precise and ordered succession of events. B: Development of embryo is purely due to differentiation.
The arithmetic growth rate is mathematically expressed as:
Match Column I with Column II Column I Column II (a) Auxin (i) Derivatives of carotenoids (b) Gibberellic acid (ii) Adenine derivatives (c) Abscisic acid (iii) Indole compounds (d) Kinetin (iv) Terpenes
Which of the following structure is a product of redifferentiation?
Which PGR promotes nutrient mobilisation and helps in the delay of leaf senescence?
Which of the following hormone does not promote growth in plants?
Plant growth regulators are generally:
Identify the plant growth inhibitor(s). i- ABA ii- Cytokinin iii- GA 3 iv- IAA v- C 2 H 4
Who was the pioneer in discovering plant growth hormones?
How many of the followings are mainly growth promoting phytohormones? ABA, C 2 H 4 , IAA, GA 3 , IBA
Recall the experiment conducted by Darwin on canary grass. Now imagine what would happen if coleoptiles of canary grass are removed?
Charles Darwin was working on which plant while discovering first plant growth hormone?
When illuminated by unilateral light, coleoptiles of canary grass will show:
F.W. Went was working on which plant to isolate the auxin?
When light is acting as a stimulus for canary grass, what type of response is shown by its coleoptiles?
Auxin was isolated by:
Kinetin was discovered by F. Skoog while working on callus of which plant?
Who reported the symptoms of ‘bakanae’ disease in rice seedlings?
Proliferation in callus can be attained by using auxins with i- DNA or coconut milk ii- Yeast extract iii- Extracts from vascular tissues
Match the columns: Column I Column II (a) IAA (i) Terpenes (b) GA (ii) Indole compounds (c) Ethylene (iii) Adenine derivatives (d) Cytokinin (iv) Gas
Identify the three types of inhibitors purified and chemically characterized in mid-1960s. i- Inhibitor A ii- Inhibitor B iii- Abscission I iv- Abscission II v- Dormin
Which of the following chemical can be used to ripen the unripen bananas?
Identify the phytohormone which is volatile in nature.
2, 4-D and 2, 4, 5-T belongs to which of the following plant hormone group?
Apical dominance is promoted by:
Which of the following hormone can be applied on stem cuttings to initiate extensive root production?
Dilute solution of NAA and 2,4-D is used to induce flowering in: i- Sugar beet ii- Cabbage iii- Litchi iv- Pineapple
Commonly used auxins for inducing root formation on stem cutting are:
Which of the following strategy will be useful for preventing flowering in lettuce?
Which of the following application does not belong to auxins?
Differentiation in xylem tissues is controlled by:
Identify the incorrect statement about auxins.
Identify the auxins extensively used in agricultural and horticultural practices. i- IAA ii- IBA iii- NAA iv- 2,4-D
The process of removing apical buds to overcome apical dominance is known as:
Decapitation is widely used in: a- Hedge making b- Tea plantation c- Flowering d- Fruiting
Which of the following is precursor of auxin?
Chemically, the following phytohormone is terpene.
Seed dormancy due to chemical inhibitors can be removed by treating the seeds with
Abscission of old mature leaves, fruits and flowers is promoted by which of the following hormone?
2,4-D is used to remove:
A- Auxins initiate and promote cell division in cambium. B- Low level of auxin in plant body will lead to premature falling of leaves, fruits and flowers.
Which of the following test forms bioassay for auxin?
Apical dominance means:
Which of the following plants show bolting on application of gibberellins?
Length of fruit stalks and infructiscence in grapes can be increased by the application of:
Which plant growth regulator can increase the yield of malt from barley grains?
Early maturity and seed production in juvenile conifers can be attained by using:
Spraying gibberellins on sugarcane field increases yield by as much as twenty tones per acre. This is achieved by increasing:
With the help of which hormone fruits can be left on the tree longer so as to extend the market period?
Cytokinins are usually synthesized in
Kinetin was obtained from
Ageing and fall of leaves and flowers is promoted by:
Zeatin is a natural cytokinin. It was first isolated from:
Which of the following PGR is produced in tissues undergoing ageing and ripening fruits?
During ripening of fruits, ethylene hormone raises the rate of respiration. This phenomenon is known as:
Application of which PGR will increase the surface area of absorption in roots?
Rapid internode/ petiole elongation in deep water rice plants is possible because of:
Commercially used form of ethylene is:
Which of the following hormone is responsible for accelerating abscission in fruits and flowers?
Seed dormancy is promoted by:
Which of the following hormone is responsible for promoting femaleness in cucumbers?
Which one of the following is known as stress hormone?
Bud dormancy is promoted by:
All cells of a plant are descendants of:
Difference between a seedling and a plantlet:
Identify the correct statement(s). I- Plant growth is the most fundamental characteristics of a living being. II- Growth is clearly visible characteristic of living organisms. III- Growth is a reversible permanent change in plant body.
Vegetative growth is:
Generally, growth is due to:
Which of the following are responsible for primary growth in plants? I Root apical meristem II Shoot apical meristem III Vascular cambium
Secondary growth is commonly seen in:
Select the incorrect option.
Identify the correct statement about growth in plants.
Which of the followings can possibly indicate growth happening at cellular level? A- Increase in number of cell organelles B- Increase in mass of the protoplasm C- Increase in surface area of the cell D- Increase in number of cells
A cell is said to enter which phase of growth when a new cell wall gets deposited towards the inner side of its primary cell wall?
Maximal size in terms of wall thickening and protoplasmic modification are achieved by:
Which of the following does not represents correctly characteristic of cells in meristematic phase of growth?
During geometric growth, which of the following phase shows continuous increase in growth rate?
Which of the following is incorrect for arithmetic growth?
Why exponential phase is seen during geometric growth?
Which of the following is an intrinsic factor controlling plant growth and development?
A- Deficiency of nutrients in soil will affect growth and development of plants. B- External factors like temperature, light and gravity do not affect growth in plants.
Low water content in soil shows the following influence on plant growth. i- Slow growth in plants ii- Slow enzymatic activity in plant cells iii- Reduced physiological activities in plants.
Metabolism occurs at the expense of:
Formation of primary phloem is an example for:
A: Cork in plants is formed as a result of re-differentiation. B: Secondary cortex is formed as a result of dedifferentiation.
What changes would occur in a parenchyma cell to form a treachery element? (i) Loss of protoplasm contents (ii) Deposition of strong and rigid secondary cell wall (iii) Lignocellulosic deposition in secondary cell wall
Plasticity in buttercup is an example of:
Development in plants is sum of:
One of the following Plant Growth Regulators shows more growth inhibiting activities than growth promoting activities.
The product formed by the action of following microbe of nitrogen cycle is used to break dormancy due to growth inhibitors like abscisic acid, phenolic acids, ferulic acid, para-ascorbic acid etc.
Choose the tissue not formed by redifferentiation
Auxin was isolated by X in the plant Y. X and Y are respectively
Choose the incorrect statement
Choose the incorrect statement
Choose the incorrect pair with respect to plants or plant parts involved in the discovery of plant growth regulators by various workers
Seed dormancy may be due to: i- Impermeable and hard seed coat ii- Presence of chemical inhibitors iii- Presence of immature embryos
Identify the chemical capable of breaking seed dormancy.
Vernalisation refers to:
Winter varieties of wheat are sown in which season?
Which of the following is incorrect for winter verities of wheat?
One of the following Plant Growth Regulators is formed due to catabolism of carotenoids.
Choose the incorrect statement.
The site of perception of light/dark duration in a plant body:
In order to initiate flowering, long day plants requires:
In order to initiate flowering, short day plants require:
What is the relation between exposure to light duration and induction of flowering response for day neutral plants?
The response of plants to periods of day/night is termed:
For inducing flowering, a hypothetical hormone migrates from:
Which amongst the following is true for the plant whose tap root is rich in β carotene and also it gets swollen to store food?
ABA is antagonist to:
Identify the plant growth regulator responsible for bolting in cabbage.
Vegetative growth is:
Which of the following tissues are responsible for increase in the girth of the organs in which they are active? I- Lateral meristems, II- Vascular cambium III- Cork-cambium IV- Shoot apical meristem V- Root apical meristem
Identify the incorrect statement w.r.t. development.
The plant growth regulator that promotes bolting in many plants with rosette habit also
Malting process in breweries can be enhanced by the application of the following plant growth regulator.
Identify the plant growth regulators that are involved in parthenocarpic fruits formation.
Which plant growth regulator promotes apical dominance?
Stomatal closure is promoted by the following plant growth regulator.
Which phytohormone is derivative of carotenoids?
Choose the incorrect statement
A plant growth regulator which is a derivative of carotenoids
Choose the incorrect pairs. A. Product of re-differentiation – Collenchyma. B. Product of dedifferentiation – Fascicular cambium C. Product of differentiation – Guard cells
The ‘bakanae’ (foolish seedling) disease of rice seedlings, is caused by
Heterophylly is an example for
Seed dormancy is broken and seed germination is promoted by the application of the following phytohormones.
Which plant growth regulator is use for thinning of cotton, cherry and walnut?
The reason for seed dormancy is
Choose correct option w.r.t. plant showing environmental heterophylly.
Match the following. Column I Column II A Stem elongation in sugarcane i Ethylene B Eradication of dicot weeds ii Gibberellins C Delay of leaf senescence iii 2,4-D D Fruit ripening iv Cytokinins
Growth with respect to the following parameter is difficult to measure.
In a flowering plant, the photoperiod perceiving part is A and cold temperature perceiving part is B. A and B are respectively
Efficiency index is:
Read the following statements and identify the PGR. (a) It is a terpene derivative. (b) It helps in promoting bolting in plants.
The site of perception of light/dark duration in plants is:
Cell division is synergistic effect of which of the following phytohormones?
Early seed production in conifers is promoted by
A leaf with its initial area is 10 cm 2 is grown to 15 cm 2 after certain period of time. What is the absolute growth and relative growth in area of the leaf after the given period of time.
Read the given statements and select the correct option. Statement A : All GAs are acidic Statement B: Tomato is a long day plant
Stimulus for vernalisation is perceived by
The plant hormone which counteracts apical dominance is
Which of the following hormones is also known as stress hormone?
Leaf fall can the prevented by
What is not true about auxin?
Vernalization promotes flowering in:
Gibberellic acid has been successfully used to induce flowering
The picture of given below depicts the phenomenon of heterophylly of a plant. Find the incorrect statement with reference to the same.
If the seedlings are grown in darkness
Seed dormancy may be due to
The hormone involved in the metabolism of food material in cereal grain during germination is :
The difference shown in the morphology of leaf during the development stages will be seen in
How does pruning help in making the hedge dense?
Choose the correct statement with respect to Polymerase Chain Reaction.
How many of the following auxins are synthetic? IAA; IBA; NAA; 2, 4-D
The natural auxin of plants is
Avena coleoptile test detects the presence of
Match the column I and column II Column – I Column – II (i) Auxin (A) Adenine derivatives (ii) Gibberellin (B) Carotenoid derivatives (iii) Cytokinin (C ) Terpenes (iv) ABA (D) Indole compounds (i) (ii) (iii) (iv) 1 B A D C 2 D B A C 3 B A C D 4 D C A B
An enzyme that can stimulate germination of barley seeds is
The hormone that induces apical dominance and the hormone that acts as an antagonist to this process is
Vernalization is best defined as
Absolute growth rate can be best defined as
What is the meaning of bolting?
Identify a, b, c and d in the given sentences. 1. Spraying sugarcane crop with …….. a ….. increases in the length of the stem, thus increasing the yield by as much as ….. b……. tonnes per acre. 2. ….. c. ……. does not occur naturally in plants. 3. Search for natural substances with cytokinins like activities led to the isolation of …… d ….. from corn kernels and coconut milk.
Which of these plant hormones allows the plant to withstand extremely dry climates?
The internodal segments of tobacco stems the callus proliferated only if it contains (i) in addition to (ii)
Which of the following is CORRECT about growth? (a) Growth is regarded as one of the most fundamental and conspicuous characteristics of a living being. (b) Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell. (c) Growth is accompanied by metabolic processes (both anabolic and catabolic), that occur at the expense of energy.
Internodal elongation is stimulated by :
Identify a, b, c and d in the statements given below : a. In ………. a …….. growth, both the progeny cells following mitotic cell division retain the ability to divide and continue to do so. b. In ………. b ……… growth following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures. c. Arithmetic growth is mathematically expressed as …….. c ……….. d. The exponential growth can be expressed as ……. d ……..
Which of the following physiological effects is caused in plants by gibberellic acid?
The plants for which flowering is either quantitatively or qualitatively dependent on exposure to low temperature. This phenomenon is termed as
Which disease is associated with the discovery of Gibberellins?
The end product of link reaction is the precursor of a plant growth regulator. Which of the following statement holds true for that PGR?
Choose the correct statement.
