D, the correct one is D. that is what is thought in most schools.<span />
Answer:
a dead organism right? if so, the dead organism must be buried in silt and sand. this will allow the air and bacteria to be kept away from the organism.
Explanation:
The body's most important nonspecific defense against pathogens is the skin. The nonspecific defense system in the body guards against keeping infections from the body. Some of the nonspecific defenses are tears, mucus, and sweat among others. The correct answer will be D.
The answer is A. random gene pool changes in small population.