Natural Selection Acts Most Directly On

question 59

Multiple Choice

Natural selection acts most directly on:

• A) populations.
• B) communities.
• C) ecosystems.
• D) the biosphere.
• E) K- selected organisms.

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Definitions:

Cross-sectional

An observational study type that examines data collected from a population or a representative sample at one particular point in time.

Cross-sectional

A research design that analyzes data from a population, or a representative subset, at one specific point in time.

Longitudinal

A study setup where the same factors are observed multiple times over periods that can be either brief or extended.

Prospective Cohort

A study that follows a group of similar individuals over time to determine how their exposures affect their outcomes.