Answer:
Mutations in DNA
An offspring receives half of its genetic material from its mother and half from its father.
Explanation:
Can we get a picture of the question?
Answer:
The answer is because they are in free fall. In a vacuum, gravity causes all objects to fall at the same rate. The mass of the object does not matter. If a person drops a hammer and a feather, air will make the feather fall more slowly. But if there were no air, they would fall at the same acceleration.
Explanation:
B. when the immune system attacks the body's own cells