The adaptive immune response, or third line of defense, is activated when the first and second lines of defense do not succeed in containing an infection. it is adaptive because the cells in this part of the immune system are capable of responding to specific pathogens. another important feature of the third line is the ability of these cells to create memory cells. why are memory cells an important product of an immune response
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Biology, 21.06.2019 20:10
Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva
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Whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.
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Biology, 22.06.2019 22:30
Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the traits of color blindness. the only unknown is the father in the generation.
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The adaptive immune response, or third line of defense, is activated when the first and second lines...
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