The external structures of the prokaryotic cell include a plasma membrane, cell wall, and capsule (or slime layer).
It regulates the menstrual cycle, affects the reprise tract, the urinary tract, the heart and blood vessels, bones, breasts, skin, hair mucus membranes, pelvic muscles and the brain
Answer:
CD4 on the surface of helper T-cells.
Explanation:
MHC class II ( major histocompatibility complex) molecules are processed from the exogenous source. The presentation of antigen on cells are important for the adaptive immune response.
MHC class II interact with CD 4 present on the surface of T helper cells. This interaction is important for the generation of an immune response. Helper T cells can release cytokines and can perform phagocytosis.
Thus, the correct answer is option (C).
A nucleus consists of a nuclear membrane that surrounds it, within the membrane there is a nucleolus which can be compared metaphorically to the yolk of an egg in appearance. The nucleolus is surrounded by nucleoplasm which is quite like the cytoplasm.
Answer:
a steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures.
Explanation:
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