You are an evolutionary biologist working for the Smithsonian. On a fossil dig in the eastern Montana Badlands, you discover fossil evidence that shows the earliest eukaryotic cells contained only free-floating ribosomes. Briefly state what conclusion(s) could be drawn from this evidence.?
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Biology, 21.06.2019 23:00, cancerbaby209
What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function
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Biology, 22.06.2019 03:00, seahorse0
To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.
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Biology, 22.06.2019 03:30, maloynegen7681
Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what
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Biology, 22.06.2019 13:30, daniellealex
Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?
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You are an evolutionary biologist working for the Smithsonian. On a fossil dig in the eastern Montan...
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