Natural selection tends to increase what?

What is the name of the immune system response that involves B-cells?

One group of chimpanzees slurp termites directly from a stick; another group picks them off the stick one by one. one group of chimpanzees breaks nuts with a stone hammer; another group does this with a wooden hammer.

Which nutrient is primarily a building material for the body

Findings and sources

Powerful tropical storms that are characterized by wind speeds greater than 120km/h and Storm surges are called

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.

When blockages in the bloodstream read the Brian it can cause blank?

A gazelle is born with slightly longer legs which allow it to run faster than the other gazelles in the herd. This adaptation came may have come about because a. the gazelle needed to be able to run faster. b.

In a population of deer mice, the allele for white hair is recessive and the allele for brown hair is dominant.

What makes a molecule a saturated fat?