Which organism has ganglia?
select one:
a. flatworm
b. fish
c. sponge
d. hydra

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

What is the problem in this article? what solution does the article propose?

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true