The answer would be C, "The earth is heated by terrestrial radiation."
Terrestrial radiation is a factor in what heats up the earth and it's a major factor in the study of global warming.
D) take in nutrients because endocytosis is the process when a cell takes in food
Electrons are the smallest of the three particles that make up atoms. Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus. They group together in the center of the atom.
A control group is important to a controlled experiment because it is used in an experiment to establish its validity.
D: The reactions take place in the thylakoid of the chloroplast.
