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

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?

What is the primary function of the nervous system?