Which Statement Correctly Explains Why Hair Appears the Way It

question 11

Multiple Choice

Which statement correctly explains why hair appears the way it does?

• A) Kinky hair has flat, ribbonlike hair shafts.
• B) Perfectly round hair shafts result in wavy hair.
• C) Gray hair is the result of hormonal action altering the chemical composition of melanin.
• D) Air bubbles in the hair shaft cause straight hair.

---

Definitions:

Genetic Diversity

The total number of genetic characteristics in the genetic makeup of a species, facilitating adaptability and survival.

Genetic Bottleneck

A sharp reduction in the size of a population leading to a decrease in genetic diversity and potential changes in the population structure.

Artificial Selection

The selective breeding of animals and plants to encourage the occurrence of desirable traits. Individuals with preferred characteristics are mated or cross-pollinated with other individuals having similar traits.

Genetic Drift

A mechanism of evolution that involves random fluctuations in the frequency of alleles of a population over time.