PART - 2 - Unit IV : CH - 13 Plant Growth and Development — BIOLOGY STD 11 Science — Question

Name two iron-containing proteins involved in electron transport.

In some germinating seeds, enzymes mobilise nutrients present in the cotyledons. Name the phytohormone that stimulates the production of such enzymes.

Who first observed phototropic curvature in plants?

Name (a) the form in which ammonia is excreted and (b) the body part that excretes it, in a bony fish.

Which finger of the male frog develops into nuptial pad?

Pepsinogen is an inactive nezyme released by the gastric glands of the stomach. (a) How is it activated? (b) Which nutrient does it act upon?

Which hormone can be used to overcome the effect of apical dominance in plants?

Fill in the gaps: Reabsorption of water from distal parts of the tubules is facilitated by hormone _______.

In humans, starch digestion starts in the buccal cavity, but stops in the stomach. Why?

Flame cells are found in animals of which phylum?