Examlex
A form of natural selection favoring the spread of alleles that promote behaviors that help close relatives is called _____ selection.
Labeled Structure
An anatomical or architectural feature that has been identified and named.
Sarcomere
A sarcomere is the functional unit of a muscle fiber, comprising the filaments actin and myosin, responsible for muscle contraction.
Skeletal Muscle Tissue
A type of muscular tissue attached to bones, responsible for voluntary movements of the body through contraction and relaxation.
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