Plants have specialized structures that perform their necessary life functions. The gases that are crucial to proper function within a plant are oxygen and carbon dioxide. What structure would control the exchange of these gases in
a plant?

a. mesophyll
b. trichomes
c. root hairs
d. stomata

Stomata

Explanation:

Normally stomata open when the light strikes the leaf in the morning and close during the night.

d. During photosynthesis, CO2 enters the plant leave through opened stomata and in return it releases glucose,oxygen and some little molecules of water

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."