<span>T cells are a class of leukocytes that play a large role in the secondary immune response. "T" is the abbreviation of the thymus, the organ in which their development ends.
They are responsible for cellular immunity: cells infected with a virus, for example, or cancer cells are known to be foreign to the body (that is, distinct from the cells that T cells have learned to tolerate when maturation) is destroyed by a complex mechanism.
T-cell needs the antigen MHC I molecule (present in all the nucleated cells), to be activated.
While The B cell needs the antigen presented by MHC II molecule present in antigen presenting cells.
</span>T-cells bind 1 type of antigen (which is an endogenous antigen, as opposed to B cell which bind exogenous antigen) which must be presented by another cell.<span>
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Answer:
D. all the sunshine in a lake
Natural selection is the correct answer
All three scientists would most effectively demonstrate their concepts by using models.
Models are often used in science to provide a simplified visual representation of a certain phenomenon, making it easier to observe, understand and predict the possible future outcomes or effects of the demonstrated phenomena.
