Question

When a certain plant is without water for an extended period of time, guard cells close openings in the leaves of the plant. This activity conserves water and illustrates
A. cellular communication involving the action of nerve cells and receptor sites
B. an increase in rate of growth due to a low concentration of water
C. maintenance of a dynamic equilibrium through detection and response to stimuli
D. a response to one biotic factor in the environment

Answer 1

Answer:

a response to one factor in the environment