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Biology, 22.06.2019 03:30
Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins
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Biology, 22.06.2019 09:30
What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid
Answers: 1
Biology, 22.06.2019 10:30
Natural selection changes allele frequencies because some survive and reproduce more successfully than others.
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Biology, 22.06.2019 12:30
Are the layers of rock above and below the coal older or younger?
Answers: 1
Which is the best description of the two organisms highlighted in pink? they are separated by two n...
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