It is only active at a pH of around 2 because that is around the same pH as the gastric juices in the stomach which is where pepsin is used to break down proteins.
<span>Others are external fertilization:
</span>a. all of the sperm will fertilize eggs.
b. sperm and egg will be released simultaneously.
c. the number of sperm and eggs produced will be equal.
<span>e. sperm will be protected until they can unite with the eggs.</span>
Answer:The real answer is D
Explanation:
Answer:
C
Explanation:
Nonspecific defenses provide the body with general protection against foreign invaders
It is called autonomic because it works on its own and it regulates organs functioning which is a thing that happens involuntarily. It regulates heart beats for example and it's not something that you do voluntarily since the heart beats regardless of you. It also controls things like vomiting or sneezing that you can't choose not to do when it starts happening.