Examlex
The graphic representation of energy relationships in an ecosystem is a(n) ____.
Iris
The colored part of the eye that controls the diameter and size of the pupil, thus regulating the amount of light that enters the eye.
Pupil
The opening in the center of the iris of the eye that adjusts size to control the amount of light reaching the retina.
Protective Covering
A layer or structure that serves to shield or guard an organism or part of an organism from harm or injury.
Eyeball
The spherical part of the eye that contains the optic structures and is responsible for vision.
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