Photosynthesis is an example of
an exothermic reaction.
an endothermic reaction.
a reaction that gives off heat.
a reaction that emits energy.

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

What do transitional fossils best support?