Examlex
Variations in a population are produced by __________.
Excretory System
A biological system responsible for the removal of waste products and excess substances from an organism's body to maintain internal chemical homeostasis and prevent damage to the body.
Mesoderm
The middle layer of an embryo in early development, which will develop into muscles, bones, and much of the circulatory, reproductive, and excretory systems.
Epidermis
The outermost layer of cells in both plants and animals, serving as a protective barrier against the environment.
Archenteron
The primary gut that forms during gastrulation in the developing embryo.
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