Answer:
B
Explanation:
B is referring to cell theory, which basically states that all living things are made of cells and all cells come from other cells withe the exception of the first life forms.
Sodium bicarbonate and digestive enzymes.
Answer:
Substitute the P-II promoter (makes RNA II) for one that is stronger, or mutate the P-I promoter to make it weaker.
The cells directly responsible for cellular immunity are the cytotoxic T cells (lymphocytes).
Cellular immunity is an immune response against infectious diseases caused by viruses and some bacteria. This mechanism does not involve antibodies, but rather cytotoxic T-lymphocytes, phagocytes and the release of cytokines in response to an antigen. <span>Cytotoxic T cells, perform their function by killing infected cells via apoptosis.</span>
