Biology 2016 Set 9
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1.Plants do often die in waterlogged soil. Give reason.  2.Give one difference between pyranose and furanose forms of simple sugars,  3.Mention any two unique and special properties of nervous tissue.  4.A farmer is using 2,4-D on his wheat crop field. What is the purpose of using this substance in the field?  5.Give the scientific term used for lateral appendages in aquatic annelids. 
6.Oxygen is evolved during which type of phosphorylation? Name the source from where it comes and mechanism involved in it. List the ions involved in its catalysis.
7.List differences between cilia and flagella. 
8.Why is the absorption of minerals by the plants takes place through roots, not by leaves? 
9.Write a note on cortex region of dicot root. 
Why does the body deaminate excess amino acids? 
10.Why are blood, bone and cartilage called connective tissue? 
11.(a) What are casparian strips? State their function. 
(b) Define wood botanically. 
12.Describe the fate of pyruvic acid in the absence of oxygen. 
13.Draw a diagrammatic representation of mechanism of translocation. 
14.(a) While observing a dividing cell under microscope, is it possible to determine whether it is a plant or animal cell? 
(b)Give an account of differences in mitotic division of a plant cell and animal cell.
15.How is sulphur important for plants? Name the amino acids in which it is present?
16.Describe tertiary structure of protein with an example. 
17.(a) Name the plants having adopted ‘Kranz anatomy’ and for what that condition are they adapted to?
(b) In what respect are these plants superior to those who lack this kind of anatomy? 
18.The heterosporous pteridophyte show certain characteristics which are precursor to the seed habit in gymnosperms. Explain. 
19.Canopy of banyan tree is extended over a large area”. Explain. 
20.What type of skeleton provides support and shape to Hydra? Explain. 
What are the peculiar features that you find in parasitic Platyhelminthes? 21.Sohini while going through her biology lessons at home, came across the statement that certain hormones work in an antagonistic manner in our human body to regulate a particular kind of metabolism. She got confused and didn’t understand the concept. Next day, she asked her biology teacher that how two hormones regulate each other’s activity antagonistically. The teacher explained him with the help of examples related to our body system. Then she easily understood the concept.
(a)Name two pairs of hormones that are antagonistic to each other. Describe their functions as well. (b)What do you understand by target tissue or organ, with respect to hormonal action? (c)What values are reflected by Sohini’s teacher? 
22.Explain briefly, micturition and disorders of the excretory system. 
Describe the important steps in muscle contraction.  23.What do you understand by photoperiodism and vernalisation? Describe their significance.  or
Taking the example of a bacterial cell, describe the structure of a prokaryotic cell.