Evolution & Genetics questions
21 fact-checked questions — tap any to predict the answer, then read why.
- 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?
- Platypus bills and some dolphin whisker pits both sense weak electric fields. What pattern is this?
- Why do platypuses have around 40,000 electroreceptors while short-beaked echidnas have only around 400?
- After K-Pg, some plankton populations crashed without bouncing back. Why can a species go extinct even with some survivors still alive?
- In asteroid darkness, why did some algae survive by becoming less plant-like?
- Why did freshwater animals survive the asteroid impact winter better than land animals?
- Why might a spinosaur's salt gland be located above its eye?
- Why do spinosaur skull grooves hint at salt glands?
- Why didn’t humans just grow thick fur back instead of making clothes?
- Why didn’t humans’ loss of body hair wipe them out by making cold easier to feel?
- If less hair helped, why didn’t humans become fully hairless?
- Why do humans have much less body hair than most mammals?
- Why do we have wisdom teeth?
- Why do giraffes have long necks?
- Why do fruits taste sour or sweet?
- Why can't penguins fly?