Answer:
The tiny muscles that make up the iris, known as the circular and radial muscles, relax and contract to maintain a fairly constant level of light entering the eye. In bright light, the circular muscles contract whilst the radial muscles relax. This causes the pupil to constrict and less light enters the eye.
Explanation:
A plants root cap helps the roots recieve water so......yeah
Answer:
C. biomes
Explanation:
"biomes" is the only answer choice that is a geographical area
The water cycle is driven primarily by the energy from the sun.
