Which of the following best explains why a robertsonian carrier may have no health problems due to his or her chromosome rearrangement?
a. genes on the lost p arms can be found elsewhere in the genome.
b. there are no genes found on any of the p arms of acrocentric chromosomes.
c. all acrocentric p arms contain the same base sequence.
d. the long q arm chromosome copies the genetic information from the p arms before they are lost.

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.