Why didn’t humans’ loss of body hair wipe them out by making cold easier to feel?
Show answer & explanation
Answer: Behavior helped compensate
Behavior helped compensate ✓ — Correct! Early humans could offset some of the cost through behavior and tools, using shade, fire, shelter, grouping, and better timing of activity.
Humans stopped feeling cold — Wrong. Humans still feel cold. The key is that behavior can reduce the cost of being less furry.
Skin made extra heat — Wrong. Skin helps regulate heat, but it is not a special new heat-making engine that replaced body hair.
More Evolution & Genetics questions
- Which of the following best describes a common change in RNA transcript length with age?
- Why do different organs in mammals show different gene activity patterns related to longevity?
- What can researchers learn about people of the same age from separate RNA-based aging clocks that estimate age from inflammation-related and metabolism-related gene activity?
- Aging RNA signals grouped into modules, not one score. What does a module view reveal?
- Why might aging mouse, monkey, and human cells show similar changes in the RNA they produce across different tissues?
- Why does a platypus still count as a mammal when it lays eggs and has no nipples?