A When population growth increases in an area, what is happening to the birth rate and age structure of that population?
increasing birth rate with a greater number of young organisms
increasing birth rate with a smaller number of old organisms
C increasing birth rate with a smaller number of young organisms
d. increasing birth rate with a greater number of old organisms
b
Please select the best answer from the choices provided
A
B

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

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.

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall