Photo Credit: Ralph T. Hutchings

question 31

Multiple Choice

Photo Credit: Ralph T. Hutchings
Figure 8-1 Structural Components of the Brain (Sagittal Section)
Use Figure 8-1 to identify the labeled part.
-Structure I is the

• A) midbrain.
• B) medulla oblongata.
• C) cerebellum.
• D) basal ganglia.
• E) pons.

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Definitions:

Population

A group of individuals of the same species living and interbreeding within a given area.

Allele Frequency

Allele frequency refers to how common an allele is in a population, expressed as a proportion or percentage of all alleles for a given gene in the population.

Stabilizing Selection

Natural selection that acts against extreme phenotypes and favors intermediate variants; associated with a population well adapted to its environment. Compare with directional selection and disruptive selection.

Natural Selection

The process by which individuals with traits better suited to their environment are more likely to survive and reproduce, driving the evolution of species.