Answer:
Spider has a circulatory system
Answer:
when the offspring born, they have a low survival rate during first year but as they reaches maturity, their survival rate increases.
this type of survivorship is Type III
Explanation:
T cell receptor, Cytotoxic T Cell, CD4, Antigen, Bacterium,
B – cell, Cell mediated response, Class II MHC, Cytokines, and Humoral Response
are the components for the activation of a helper t cell by a dendritic cell.
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