B, C, D, B
I hope these are right, hope this helped.
Its common. In the last 10 million years, there have been 4 or 5 reversals per million years
Insulin controls blood sugar by lowering it, glucagon tells the liver to release its stored sugar into the blood stream, increasing blood sugar.
answer:
plasma membrane a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or in closes a vacuole, and regulates the passage of molecules in and out of the cytoplasm
answer number 2
the plasma membrane or cell membrane, is the phospholipid layer that surrounds the cell and protects it from outside environment.
you can use either answer if you have to type or write an answer
<span>The macrophage is the cell responsible for detecting, engulfing and destroying pathogens and apoptotic cells. These cells process and present antigens (foreign materials) to immunocompetent cells and thus they are the key mediators in the development of all immune reactions.</span>