Tissue typing is a screening process in which cell markers in a donated organ or tissue are identified so that they can be matched to a recipient with similar cell markers. This has become more important in recent years because of the number of organ transplants
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
Its b or d
Explanation:
None
Vegetation reproduction <span />
This is extremely vague, but assuming this is regarding concentration gradient in the nervous system, the Sodium-Potassium pump is responsible for transporting sodium and potassium.
