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?
- Two people can be the same age but show different RNA-module aging. What would a module clock show?
- Aging RNA signals grouped into modules, not one score. What does a module view reveal?
- Mouse, monkey and human cells show similar aging RNA shifts across tissues. What does that hint at?
- A platypus lays eggs but feeds hatchlings milk without nipples. What makes that less contradictory?
- Platypus bills and some dolphin whisker pits both sense weak electric fields. What pattern is this?
- Platypuses have ~40,000 electroreceptors, but short-beaked echidnas have ~400. What best explains the drop?
- 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 K-Pg 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?
- Less hair makes cold easier to feel. Why didn’t that wipe humans out?
- 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?