Which of the following is NOT a part of a DNA molecule? Nitrogen base
Phosphate group
5 Carbon sugar
Amino acid

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic