Which structure is most necessary for a mitochondrion to produce new molecules?
a. hydrogen
b. nucleus
c. vacuole
d. lysosomes

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

The carrier molecules of the electron transport system are located in the

This is collection of data made by comparing objects in standard units. in science, the units are metric.