B and D is out. It cant be A because heat of combustion is substance not compound. So the answer is D.
Answer:
371km
Explanation:
the lower the more fuel there is
Answer:
The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an antigen and attract cells that will engulf and destroy the pathogen. The main cells of the immune system are lymphocytes known as B cells and T cells.
Answer:
Answer choice A
Explanation:
When an electron is transferred to another atom, both atoms involved become ions.
It’s A
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