BOTANY – 2002, PAPER – II , SECTION B

SECTION B

5.       write short notes on any FOUR of the following in about 150 words each:

(a)    growth regulators

(b)   photoperiodism

(c)    controlled storage of seeds

(d)   seed germination

(e)   Social forestry.

6.       (a) How do you understand by eco-system?

(c)    How would you maintain any eco-system?

7.       (a) What is mineral deficiency?

(b) What are the deficiency symptoms of the following minerals?

Nitrogen,   Zinc

Calcium   , Iron

8.       (a) Discuss the mechanism of nitrogen fixations by the leguminous plants. How the nitrogen fixation is measured?

(b) List the various Rhizonium species and their host legumes.