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Biology, 22.06.2019 02:30
Are the earth's ocean floor and continents the same age geologically? why or why not?
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Biology, 22.06.2019 04:30
Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?
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Biology, 22.06.2019 06:30
Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative
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Biology, 22.06.2019 07:00
In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -
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Definition of biotic factors and abiotic factors...