Cotyledons, or "seed leaves," absorb food molecules stored in the

A) megaspore.
B) ovary wall.
C) sporophyte.
D) endosperm.
E) gametophyte.


D

Biology & Microbiology

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Ocean acidification is caused by ____

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Scientists are always thinking about ways to improve experimental design. In the text's potato chip experiment, which

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If our bodies are capable of secondary responses, how do people contract influenza more than once?

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In some areas of the world where there are large numbers of pines, everything is covered in the spring with a yellow dust that turns out, upon examination, to be pine pollen. Why must conifers produce so much pollen, and why do we not see as much pollen

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Biology & Microbiology