Which of the following is an indicator of good water quality?
a. high levels of nitrates
b. high levels of phosphates
c. zero turbidity
d. all of the above

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

How does the nervous system affect the excretory system?

Differentiate renewable and nonrenewable resources