Humans cause major changes to biodiversity, why is it important to preserve biodiversity?
a. organisms are used for medicine
b. we rely on organisms to prevent infectious diseases
c. both a and b
d. none of the above

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

the answer is c a tornado