Answer:
The iris has an adjustable circular opening called the pupil, which can expand or contract to control the amount of light entering the eye, Fromer said. Ciliary muscles surround the lens.
Answer:
A. They must be excreted from the cell.
Explanation:
Respiration is a process in which energy is released due to the breakdown of glucose molecules with the addition of oxygen forming carbondioxode, water and energy in the form of ATP. This energy is used by the cell in different processes and activities. Water and carbondioxide is a waste product which is removed from the cell during breathing of organisms.
Answer:
I think it's b.
Explanation:
You need decomposers to return the matter back into the ground.Which the food web starts all over again.
