Answer:
Yes
Explanation:
2.12 is less than 10, so it's a scientific notation.
We cannot visualize the organs or tissues inside of our body, but a biopsy helps in making a diagnosis by providing a piece of tissue for examination. Biopsies are often associated with cancer, but they can be used to diagnose other conditions and to see how far a disease has progressed.
Activated cytotoxic cells (t lymphocytes) flags cells for destruction by macrophages. Ctotoxic t cells are the most important cells in the adaptive immunity, since they are required for almost all adaptive immune responses. They help activate B cells to secrete abtibodies and macrophages to destroy ingested microbes and also activate cytotoxic t cells to kill infected target cells.
Depending on where the population is, natural selection varies. Hope this helps :-)