Diversity In Living World Important Questions for Re NEET 2026

Diversity in Living World is an important unit for students preparing for Re NEET 2026. This unit helps students understand the wide variety of living organisms found on Earth and how they are classified into different groups. It includes important chapters such as The Living World, Biological Classification, Plant Kingdom, and Animal Kingdom. These chapters form the base of Biology and are useful for understanding many other topics in the NEET syllabus.

Practicing Diversity in Living World important questions for Re NEET 2026 can help students revise key concepts in a simple and focused way. Many questions from this unit are directly based on NCERT facts, examples, features, and classifications. Students should pay attention to topics like taxonomic hierarchy, binomial nomenclature, five kingdom classification, gymnosperms, bryophytes, pteridophytes, animal phyla, chordates, and non-chordates.

These important questions are useful for improving accuracy, speed, and confidence before the exam. They also help students identify which topics need more revision. By solving chapter-wise questions regularly, students can understand the NEET question pattern better and prepare more effectively for Re NEET 2026 Biology.

Diversity In Living World Important Questions for Re NEET 2026

Q1. Which of the following is the correct order of taxonomic categories?

1. Species → Genus → Family → Order → Class → Phylum → Kingdom
2. Genus → Species → Family → Order → Class → Phylum → Kingdom
3. Species → Family → Genus → Order → Class → Kingdom → Phylum
4. Kingdom → Species → Genus → Family → Order → Class → Phylum

Answer: 1. Species → Genus → Family → Order → Class → Phylum → Kingdom

Q2. The basic unit of classification is:

1. Genus
2. Species
3. Family
4. Order

Answer: 2. Species

Q3. Which of the following taxonomic categories includes one or more related species?

1. Family
2. Order
3. Genus
4. Class

Answer: 3. Genus

Q4. In binomial nomenclature, the first word represents:

1. Species
2. Family
3. Genus
4. Order

Answer: 3. Genus

Q5. Which scientist proposed the five kingdom classification?

1. Carolus Linnaeus
2. R.H. Whittaker
3. Ernst Mayr
4. Aristotle

Answer: 2. R.H. Whittaker

Q6. Which of the following is not a criterion used in Whittaker’s five kingdom classification?

1. Cell structure
2. Mode of nutrition
3. Body organization
4. Blood group

Answer: 4. Blood group

Q7. Organisms of kingdom Monera are:

1. Multicellular and eukaryotic
2. Unicellular and prokaryotic
3. Multicellular and prokaryotic
4. Unicellular and without cell wall

Answer: 2. Unicellular and prokaryotic

Q8. Which of the following organisms belongs to kingdom Protista?

1. Amoeba
2. Nostoc
3. Pinus
4. Earthworm

Answer: 1. Amoeba

Q9. Fungi are different from plants because fungi:

1. Are autotrophic
2. Have chlorophyll
3. Are heterotrophic
4. Have cellulose cell wall

Answer: 3. Are heterotrophic

Q10. The cell wall of fungi is mainly made up of:

1. Cellulose
2. Chitin
3. Pectin
4. Lignin

Answer: 2. Chitin

Q11. Which of the following groups has naked seeds?

1. Bryophytes
2. Pteridophytes
3. Gymnosperms
4. Angiosperms

Answer: 3. Gymnosperms

Q12. Which of the following is an example of gymnosperm?

1. Mango
2. Pinus
3. Funaria
4. Salvinia

Answer: 2. Pinus

Q13. In bryophytes, the plant body is generally:

1. Completely vascular
2. Without chlorophyll
3. Gametophyte dominant
4. Sporophyte dominant

Answer: 3. Gametophyte dominant

Q14. Gemmae in bryophytes help in:

1. Sexual reproduction
2. Asexual reproduction
3. Seed formation
4. Pollination

Answer: 2. Asexual reproduction

Q15. Pteridophytes are also called:

1. First terrestrial plants
2. First vascular plants
3. First flowering plants
4. First seed-producing plants

Answer: 2. First vascular plants

Q16. The gametophyte of pteridophytes is called:

1. Protonema
2. Prothallus
3. Sporophyll
4. Thallus

Answer: 2. Prothallus

Q17. Which of the following animals has a pseudocoelom?

1. Ascaris
2. Earthworm
3. Hydra
4. Planaria

Answer: 1. Ascaris

Q18. Which phylum shows water vascular system?

1. Porifera
2. Mollusca
3. Echinodermata
4. Arthropoda

Answer: 3. Echinodermata

Q19. All living members of Cyclostomata are:

1. Free-living
2. Ectoparasites
3. Endoparasites
4. Symbiotic

Answer: 2. Ectoparasites

Q20. Which of the following is a flightless bird?

1. Pigeon
2. Crow
3. Penguin
4. Parrot

Answer: 3. Penguin

NEET 2026 Biology Questions from Diversity in Living World

Q1. In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?

1. Selaginella
2. Funaria
3. Pinus
4. Wolffia

Answer: 3. Pinus

Q2. The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker in 1969 included:

A. Cell structure
B. Body organization
C. Presence of flagellum
D. Reproduction
E. Phylogenetic relationships

Choose the correct answer from the options given below:

1. A, B, D and E only
2. A, B, C, D and E
3. A, B and E only
4. B, C and D only

Answer: 1. A, B, D and E only

Q3. Which one of the following statements is not true about the universal rules of binomial nomenclature?

1. Both the words in a biological name, when handwritten, are separately underlined or printed in italics.
2. The specific epithet in the biological name starts with a small letter.
3. The first word in the biological name represents the specific epithet, while the second component denotes the genus.
4. Biological names are generally in Latin.

Answer: 3. The first word in the biological name represents the specific epithet, while the second component denotes the genus.

Q4. A group of researchers procured some fish-like animals and upon investigation the following characters were observed:

A. Endoskeleton was made of cartilage
B. Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth
C. Paired fins and scales were absent, but 7 pairs of gill slits were present

Which of the following species of animals did they consider to fit best with these characters?

1. Exocoetus sp.
2. Branchiostoma sp.
3. Petromyzon sp.
4. Scoliodon sp.

Answer: 3. Petromyzon sp.

Q5. The flightless bird with forelimbs modified as paddle-like structures suited for swimming is known as:

1. Struthio
2. Psittacula
3. Neophron
4. Aptenodytes

Answer: 4. Aptenodytes

Q6. Select the set of fishes which belong to the class Osteichthyes:

1. Devil fish, Cuttlefish and Hagfish
2. Starfish, Hagfish and Cuttlefish
3. Flying fish, Angel fish and Fighting fish
4. Saw fish, Fighting fish and Dog fish

Answer: 3. Flying fish, Angel fish and Fighting fish

Q7. Select the incorrect statements from the following:

A. Digestive system in Platyhelminthes is incomplete.
B. Bilateral symmetry is a characteristic feature of adult Echinoderms.
C. Pseudocoelom is possessed by Aschelminthes.
D. Notochord is persistent throughout life in the class Chondrichthyes.
E. Members of class Reptilia maintain a constant body temperature.

Choose the answer from the options given below:

1. B and E only
2. C and D only
3. A and C only
4. B and D only

Answer: 1. B and E only

NEET 2025 Biology Questions from Diversity in Living World

Q1. Which of the following is the characteristic feature of gymnosperms?

1. Seeds are absent
2. Gymnosperms have flowers for reproduction
3. Seeds are enclosed in fruits
4. Seeds are naked

Answer: 4. Seeds are naked

Q2. Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.

Reason (R): The members of subphylum Vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.

In the light of the above statements, choose the correct answer from the options given below:

1. A is true but R is false
2. A is false but R is true
3. Both A and R are true and R is the correct explanation of A
4. Both A and R are true but R is not the correct explanation of A

Answer: 3. Both A and R are true and R is the correct explanation of A

Q3. Which of the following organisms cannot fix nitrogen?

A. Anabaena
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc

Choose the correct answer from the options given below:

1. B only
2. E only
3. A only
4. D only

Answer: 4. D only

Q4. All living members of the class Cyclostomata are:

1. Symbiotic
2. Ectoparasite
3. Free living
4. Endoparasite

Answer: 2. Ectoparasite

Q5. Match List I with List II.

Choose the option with all correct matches:

1. A-III, B-IV, C-I, D-II
2. A-IV, B-II, C-I, D-III
3. A-II, B-IV, C-II, D-I
4. A-IV, B-III, C-I, D-II

Answer: 4. A-IV, B-III, C-I, D-II

Q6. In bryophytes, the gemmae help in which one of the following?

1. Nutrient absorption
2. Gaseous exchange
3. Sexual reproduction
4. Asexual reproduction

Answer: 4. Asexual reproduction

Q7. Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence.

A. Prothallus stage
B. Meiosis in spore mother cell
C. Fertilisation
D. Formation of archegonia and antheridia in gametophyte
E. Transfer of antherozoids to the archegonia in presence of water

Choose the correct answer from the options given below:

1. D, E, C, A, B
2. E, D, C, B, A
3. B, A, D, E, C
4. B, A, E, C, D

Answer: 3. B, A, D, E, C

Q8. While trying to find out the characteristic of a newly found animal, a researcher did the histology of the adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelom of that animal?

1. Schizocoelomate
2. Spongocoelomate
3. Acoelomate
4. Pseudocoelomate

Answer: 4. Pseudocoelomate

Q9. The correct sequence of events in the life cycle of bryophytes is:

A. Fusion of antherozoid with egg
B. Attachment of gametophyte to substratum
C. Reduction division to produce haploid spores
D. Formation of sporophyte
E. Release of antherozoids into water

Choose the correct answer from the options given below:

1. B, E, A, D, C
2. D, E, A, B, C
3. D, E, A, C, B
4. B, E, A, C, D

Answer: 1. B, E, A, D, C

Q10. Each of the following characteristics represents a kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization.

A. Multicellular heterotroph with cell wall made of chitin
B. Heterotroph with tissue/organ/organ system level of body organization
C. Prokaryotes with cell wall made of polysaccharides and amino acids
D. Eukaryotic autotrophs with tissue/organ level of body organization
E. Eukaryotes with cellular body organization

Choose the correct answer from the options given below:

1. A, C, E, D, B
2. C, E, A, B, D
3. A, C, E, B, D
4. C, E, A, D, B

Answer: 4. C, E, A, D, B