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The is an embryonic membrane that serves as the origin of the first blood and germ cells.
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Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?
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Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?
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Which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton
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Biology, 22.06.2019 11:30
If a human has 23 pairs of chromosomes in every muscle cell of its body how many chromosomes will be in a human egg or sperm
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The is an embryonic membrane that serves as the origin of the first blood and germ cells....
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