Platelet plug formation occurs at which point?
when large megakaryocytes break up into thousands of smaller fragments
when platelets are dispersed through the blood stream
when platelets are attracted to a site of blood vessel damage
none of the above

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine