Biology, 12.11.2019 22:31 meiaalvizo2005
In the meselson-stahl experiment, cells were grown for one generation in growth medium containing a relatively heavy nitrogen isotope, then transferred to new medium containing a lighter nitrogen isotope. after another round of cell division, what is true of the dna in the cells?
answer
a. all dna contains only the lighter nitrogen isotope.
b. half of the dna contains only the light nitrogen isotope.
c. all dna contains only the heavy nitrogen isotope.
d. all dna contains a hybrid of heavy and light nitrogen isotopes
Answers: 1
Biology, 21.06.2019 15:00, maevemboucher78
Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?
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Biology, 22.06.2019 00:50, bob4059
Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems
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