Reproduction in Lower and Higher Plants — BIOLOGY STD 12 Science — Question

Since your earlier school days you have been solving mysteries/puzzles labelled as use your brain power. Did you ever wonder why human brain has such a capacity? Why and how we evolved along these lines? What is the extent of similarity between humans, chimpanzees and monkeys?

From algae to forest, explain in relation with the succession.

Explain any three methods that can be used to overcome infertility.

Classify the given plant hormones as their specific effect observed in plants in Column A and complete Column B.
(ABA, GA, Ethylene, Kinetin)

Column A	Column B
(1) Bolting of rosette plants	————-
(2) Epinasty	————
(3) Closure of stomata	————-
(4) Proliferation of callus	————-

What is the source of energy for the life in deep ocean trenches where sunlight does not reach?

Can “fishery” be a sustainable job option?

Give reasons: Human female has restricted reproductive life.

Explain the structure of cyton.