Q. How is Azolla helpful as biofertilizer?

Q. Define heterothallism. Who discovered it and in which species of Rhizopus?

Q. Enumerate the applications of the plant tissue culture technique.

Q. What is holdfast? What is its use? Mention the species of spirogyra having holdfast.

Q. Describe the connecting link reaction between glycolysis and Kreb's cycle.

Q. What is the water potential value of pure water? If $5$ grams of sodium chloride is added, what will happen to its water potential value?

Q. Describe briefly, the mechanism of stomatal opening and closing.

Q. Explain the various steps in recombinant DNA technology.

Q. Define symport and antiport.

Q. What type of soil water is available to plants? Define it.

Q. Which process will be affected when coralloid roots are removed from a cycas plant? Give reasons.

Q. With the help of biochemical reactions, explain the various phases of the Calvin cycle.

Q. Define botulism. Name the bacterium responsible for botulism.

Q. Write any four physiological effects of gibberellins.

Q. Name the alkaloid obtained from the seeds of colchicum autumnale. What is its importance?

Q. Describe the internal structure of the funaria capsule.

Q. Write a short note on mass selection.

Q. Describe the structure of prothallus in Pteris.

Q. Write the enzyme code number of Glucose-6-phosphotransferase. What does the four digits of the code number indicate?