Unlike exocrine glands, endocrine glands

a. release secretions outside the body

b. release digestive enzymes.

c. releases secretions directly into the blood

d. usually have ducts

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.