It is a perfect example of a natural selection.
(I'm not sure if this is the exact answer that you are looking for.)
Answer:
<em>The gene that causes hemophilia is passed from parent to child. A mother that carries the gene is called a carrier, and she has a 50% chance of having a son with hemophilia and a 50% chance of having a daughter who is also a carrier.</em>
Explanation:
Cell membrane is the answr
The correct answer is A.) however C.) is cellular respiration or the function of the mitochondria. D.) is describing chloroplasts B.) is something concerning DNA and proteins synthesis
the three general classifications are sensory neurons, motor neurons and interneurons. I don't know how they work together to produce a response to an environmental stimulus:( sorry