For natural selection to be operating in a population, one of the things that must be present is a particular trait that must be capable of being passed on from parents to offspring. Another word for this is:

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is