The system will dilate the pupil when the retina is not receiving enough light, and the system will constrict the pupil when too much light hits the retina.

Which beat describes the brain stem

Which process of living things produces water that enters the water cycle

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.