What happens to the light wave when it moves from the air into a solid? A. It’s wavelength will become longer

B. It’s frequency will decrease

C. It’s energy will increase

D. It’s speed will decrease

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Nucleic acid certain protein cell membranes certain carbohydrates

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.