Macroevolution Occurs

question 47

Multiple Choice

Macroevolution occurs

• A)only when reproductive barriers,either pre- or post-zygotic,prevent all gene flow between two populations.
• B)when reproductive barriers,either pre- or post-zygotic,genetically isolate species,even in the presence of some gene flow between two populations.
• C)when species populations undergo changes in allele frequencies over time.
• D)when species morphology from genetic change causes their physical similarity to drift apart.

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Definitions:

Satiety Center

A region in the brain believed to control the feeling of fullness and regulate appetite, typically located in the hypothalamus.

Intracellular Thirst

A condition where cells lack water, leading to a physiological drive to drink fluids in order to hydrate at a cellular level.

Extracellular Thirst

A type of thirst caused by the reduction of the volume of the fluid found outside cells, often due to loss of blood or salt intake.

Abraham Maslow

A renowned American psychologist who is primarily recognized for establishing the hierarchy of needs according to Maslow, which is a concept of psychological well-being based on satisfying inherent human necessities in a specific order, ultimately leading to self-actualization.