Which macromolecule is involved in nearly every function in the human body?
question 6 options:

carbohydrate

lipid

nucleotide

protein

Describe two recent or ongoing space missions.

Me the formula cacl2 represents the compound

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.