All of these are first-line defenses except
a
salva
c
mtibodies
select the best answer from the choices provided

you know they are heterozygous for a trait because they have it as jj or jj.

answertheory;

increases the risk of extinction 

explanation:

the answer is that if the species suffers from the disease, there is nothing stronger than the others, so it is possible to remove wholeness. an example of this is hunger in irish potatoes, which has a deadly disease bearish part of all potato harvest masses. pretty much ruins the land of crops.

the correcdt answer shoukld be a