The diagram shows the exchange of oxygen and carbon dioxide through a capillary wall. What two systems are represented in this diagram?

a) Endocrine and circulatory
b) Circulatory and digestive.
c) Circulatory and respiratory
d) Respiratory and endocrine,

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.