There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did.
They are called compounds
The answer is D. Offspring, because that is the product of this instinctual ritual, to keep their species continuing.
no they are not exercising for the fun of it
they are not making mating calls because they have the feet and have probably already met the female.
and no he isn't going to eat her
Answer:
B. Surgery
Explanation:
I am not entirely sure but based on the definition of selection pressure (which talks about how external agents affect the survival of an organism) surgery is does not meet the definition.
A tiger hunting a prey affects the survival of prey. Beginning of ice age is an environmental agent that can affect survival of organism that cant tolerate cold. Antibiotics are drugs that can kill bacteria thus lower their survival. Surgery can actually increase survival if some form of disease is being treated.
