Name the plant growth hormone which is synthesized at the shoot tip.

Question

(i) Name the plant growth hormone which is synthesized at the shoot tip. Explain briefly why does a plant shoot bend towards light during its growth. 

(ii)With the help of a schematic diagram, trace the sequence of events occurring, when you step on a sharp object. Name this action.

Answer 1

(i) Auxins is the harmone which is synthesised at the shoot tip of a plant. When the growing shoot of a plant detects light, auxin is synthesised at the shoot tip and diffuses towards the shady side of the shoot. This stimulates cells to grow longer on the shadier side causing the plant to bend.