How Does Keratin in Skin Help Defend the Body

question 1

Multiple Choice

How does keratin in skin help defend the body?

• A) It forms an acid mantle which bacteria do not like.
• B) It traps microbes.
• C) It is a tough protein that bacteria cannot easily break through.
• D) Neither answer is correct.

---

Definitions:

Nondirectional

Pertaining to hypotheses or research questions that do not specify the direction of the expected relationship between variables.

F-test

A type of statistical test that compares the variances of two or more groups to find if they come from populations with equal variances.

T Test

A statistical test used to compare the means of two groups or samples to assess if they are statistically different from each other.

Cohen's D

A measure of effect size that indicates the standardized difference between two means.