The ABO blood group antigens do not trigger the formation of memory B cells, so every
immune response is like a first exposure to the antigen. IgM, not IgG antibodies, are
produced in an initial immune response. Explain why a fetus with type B blood is not in
danger if the mother has type A blood. Assume that this is a second pregnancy.

sorry, but you do not have posted the diagram.

what's the question ?

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.