Answer:
Explanation:
T cells are arguably the most important cells in immunity, as they are required for immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
Answer:
Physical changes in puberty include: breast development. changes in body shape and height. growth of pubic and body hair.
Explanation:
Answer: Volcanic eruptions, earthquakes and tsunamis are all dramatic examples of geological events.
Explanation:
I think they are the constituents of granite. Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. It is the most widespread of igneous rocks, underlying much of the continental crust. It is mined as either crushed stone or dimension stone mainly using open pit mining methods.
