Plant Growth and Development Test - 3

Orange-red light results in poor development of stems and hypocotyls.

Cells of quiescent centre are characterised by low mitotic activity.

Peter Boysen Jensen experimented to demonstrate that a signal must be transported from the coleoptile to the rest of the plant. He demonstrated that the signal for bending of coleoptile was not fixed but mobile.

The chemical compound for the synthesis of abscisic acid originates from chloroplasts in the leaves.

Cytokinins are known as coconut milk factor.

This sentence is true as more carbohydrates are required for vegetative growth, flowering and fruiting.

When soil water percentage is low, the lower leaves of cucurbit and tomato respond by changing from a light green colour to a dark green or blue colour.

Brassinosteroids are a class of polyhydroxysteroids, a group of plant growth regulators that stimulate cell elongation and division.

Quantity of blue light determines the extent of opening of stomata. The more the blue light, the wider they open their stomas, so accelerating their metabolism.

During the phase of cell enlargement, new cell wall material is added to thin elastic cell walls to make them thicker and permanent.