Plant Stimulus And Response

Question 1

Define stimulus

Answer 1

A change in the environment that can be detected by an organism’s receptor.

Question 2

The physiology of plant responses occurs at 3 levels, name them, give example of each.

Answer 2

1. Molecular level, ions moving across the membranes.
   2.cellular level, increasing turgor (water pressure.
   3.organ level, folding and unfolding of leaves.

Question 3

What is the stimulus in the morning and what is it’s response?

Answer 3

Presence of light, unfolding of the leaves.

Question 4

What is the stimulus at night, and what is it response?

Answer 4

Absence of light, folding of the leaves.