Biology, 30.03.2021 03:30 monica1670
A group of researchers discovered the fossilized remains of a flying mammal that appears to have lived 130 million to 165 million years ago. Since the earliest flying birds are believed to have appeared about 150 million years ago, researchers concluded that birds and mammals began to fly at about the same time. This conclusion would be most weakened by evidence of which of the following? (SC.7.L.15.1) 100-million-year-old fossil of a flying bird 120-million-year-old fossil of a flying bird A 160-million-year-old fossil of a flying mammal A 200-million-year-old fossil of a flying mammal
Answers: 2
Biology, 21.06.2019 15:30, Epicbuildzz
According to the loco mass the mass of reactants and products
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Biology, 21.06.2019 18:30, smelcher3900
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.
Answers: 3
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