An example of gene regulation is: ORNA molecules are localized in the nucleus to speed up translation.
A methyl group is added to a histone to make it easier for a gene to be transcribed.
A repressor protein can bind to a DNA sequence that blocks the promoter and prevents transcription.
Enzymes are degraded into smaller pieces to speed up their activity rate.

During convection, less dense fluid rises and denser fluid sinks.

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.