Examlex
Period and frequency mean the same thing.
Plasma
The fluid portion of blood in which red blood cells, white blood cells, and platelets are suspended.
Endotherm
An animal that uses metabolic energy to maintain a constant body temperature despite variations in environmental temperature (e.g., birds and mammals). Compare with ectotherm.
Structural Adaptation
Physical features of an organism that have evolved to help it survive or thrive in its environment.
Feathers
Specialized skin growths in birds, contributing to flight, insulation, and display.
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