Which of the following best describes the effects of water pollution on aquatic ecosystems?
a.
it can result in fish kills and restrictions on human consumption.
b.
it can change the physiology of fish.
c.
it can cause long-term alterations of aquatic ecosystems.
d.
all of the above

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

What are two reasons for why a species might disappear from the fossil record?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half