The Raw Material(s) for Evolution Is(are)

question 10

Multiple Choice

The raw material(s) for evolution is(are)

• A) trait variation.
• B) natural selection.
• C) clines.
• D) alleles.

---

Definitions:

Rods

Specialized cells in the retina of the eye that are responsible for vision in low light conditions.

Light and Dark

Refers to the natural or artificial illumination (light) and its absence (dark), influencing biological and psychological processes.

Absolute Threshold

The minimum stimulus intensity needed to detect a particular stimulus 50% of the time.

Stimulation

The act of provoking or causing a response in an organism, organ, or tissue through external or internal means.