One important adaptation of mammals is hair growing out of the skin for retaining heat. How does hair help mammals retain heat?

a. Hair increases the surface area exposed to the sun, capturing more heat from the environment.
b. Hair covers the body like a coat, keeping out the cold and stopping evaporative cooling.
c. Hair traps a boundary layer of air close to the body, retaining heat generated by metabolic processes.
d. Hair’s dark color captures more light, and light is energy, allowing mammals to capture energy to heat the body.


c. Hair traps a boundary layer of air close to the body, retaining heat generated by metabolic processes.

Biology & Microbiology

You might also like to view...

Having the typical ratio of carbon, hydrogen, and oxygen of carbohydrates, the chemical formula for glucose is

A. C12H6O12. B. C6H6O12. C. C12H22O11. D. C6H12O6. E. C6H6O6.

Biology & Microbiology

Which sort of interaction is harmful to one species but beneficial to the other? What will be an ideal response?

Biology & Microbiology

Smooth endoplasmic reticulum

A) stores calcium ions in muscle cells. B) is the major site of carbohydrate synthesis in eukaryotic cells. C) produces proteins for cell membranes. D) helps assemble ribosomes for protein synthesis.

Biology & Microbiology

When neurons are not producing electrical signals, there is still a voltage difference across their membranes. What is this voltage called?

A. Resting potential B. Ion current C. Channel-gate bias D. Electrolyte voltage E. Equilibrium potential

Biology & Microbiology