Which statement best describes sexual reproduction?
a. offspring of the same parents usually have identical chromosomes.
b. offspring receive one set of chromosomes from each parent.
c. male offspring receive most of their chromosomes from the father.
d. female offspring receive most of their chromosomes from the mother.

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.