What is the primary role of the respiratory system in living organisms?
a. to make carbon dioxide
b. to obtain oxygen
c. to use up nitrogen
d. to find hydrogen

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations