Biology, 21.02.2020 00:31 tonytashaqua
In this eight-year experiment, 12 populations of E. coli, each begun from a single cell, were grown in low-glucose conditions for 20,000 generations. Each culture was introduced to fresh growth medium every 24 hours. Occasionally, samples were removed from the populations, and their fitness in low-glucose conditions was tested against that of members sampled from the ancestral (common ancestor) E. coli population. The cells in the 12 cell lines grown in low-glucose conditions showed the effects of which of the following processes?
1.8 1.6 1.0 5,000 10,000 5,00 20,000 Generation
a. natural selection and mutation
b. conjugation and transformation
c. natural selection and gene flow
d. gene flow and genetic drift
Answers: 2
Biology, 21.06.2019 21:00
The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?
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When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal
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Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this
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Biology, 22.06.2019 07:30
The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?
Answers: 1
In this eight-year experiment, 12 populations of E. coli, each begun from a single cell, were grown...
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