Paper-II
Section A
1. Write short notes on any four of the following in about 150 words each:
a. Ultra-structural details of an eukaryotic cell (Draw neat labeled diagrams)
b. Structure and functions of ribosomes
c. Ultra-structure of plasma membrane
d. Cytoplasmic inheritance (Give suitable examples)
e. Hybrid vigour and its important in agriculture
2. Write an account of genetic code and regulation of gene expression
3. Answer the following questions
a. Given an illustrated account of linkage and crossing over
b. Write a brief account of evidences of organic evaluation
4. Answer the following questions
a. What is meant by coefficient of variation? Calculate the coefficients of variation in the following example: Numbers of leaves per plant Set 20, 14, 18, 16, 15, 18, 17, 21 Set II: 12, 20, 11, 21, 18, 22, 10, 23 Draw a conclusion on the basis of the c. v. Of the 2 sets
b. Explain the following statistical terms:
1. Null hypothesis
2. Degrees of freedom
Section B
1. Write short notes on any four of the following in about 150 words each:
a. Carbon cycle in an ecosystem (Give diagrammatic representation)
b. Cyclic photophosphorylation
c. Acid rain and its impact on vegetation and human habitation
d. Community dynamics
e. Conservation of endangered plant species
2. Given an account of structural, biochemical and metabolic changes associated with senescence of flowers and ornamentals
3. Answer the following questions
a. Write a short notes on Krebs'cycle or citric acid cycle
b. What is meant by Plant Succession? Discuss the phenomenon in relation to a drying pond giving different successional stages
4. Answer the following questions
a. What is meant by smog? How does smog affect vegetation and human health
b. Given a brief account of various factors responsible for water pollution. Suggest methods to control water pollution of important rivers of India