Answer:
B-cells have B-cell Receptors on their surfaces that can recognize million different types of antigens. .......T cells too have T-cell Receptors that detect the antigen on the surface of the Antigen are presented to the T-cell through a MHC-Antigen complex.
Explanation:
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Answer:
A cell uses active transport because active transport uses energy going from high to low (against the concentraion gradient) while diffusion (passive transport which doesn't use energy) goes from low to high.
Explanation:
The answer is C
fatty acid
Sorry for the handwriting
i think after one disappears then the other one would have to find a diffrent sourse in order to live or make a diff species