Biology, 31.08.2019 02:20 papabosue

Why has acid rain become an international problem? ?

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Biology, 21.06.2019 18:30, narutoxptheninja

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

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Biology, 21.06.2019 21:00, Kingmoney959

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

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Biology, 21.06.2019 21:00, haleylecompte

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

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Biology, 22.06.2019 08:00, cailinhannon4828

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4