3 years ago

One reason why a molecule may not be able to pass into or of the cell

1 answer:

3 0

All cells have selectively permeable membranes, which means that only they let certain important molecules inside the cell, while the others stay outside the cell.

This occurs by the process of diffusion or osmosis.

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The idea that all cells arise from the division of preexisting cells was first stated by a. Anton van Leeuwenhoek. c. Robert Hoo

Setler79 [48]

The right answer is <span>Rudolf Virchow!
Hope that helped. :)</span>

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The breakdown of food into molecules small enough to enter the blood stream is primarily accomplished by the ____.

Zinaida [17]

The best answer to fill in the blank would be B) Small intestine or the second option.

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In the summer, laboratories can become hot and stuffy. Is it appropriate to wear flip-flops or sandals to lab to keep cooler?

ANEK [815]

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4 years ago

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The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the age

ozzi

Answer:

poliinators and flagellated sperm

Explanation:

Cycads (phylum Cycadophyta) together with Ginkgophyta, Gnetophyta, Pinophyta, Pteridospermales and Cordaitales belong to the gymnosperms (naked seed-producing plants). They are different than angiosperms which produce encased seeds within an ovary.

Cycads (but also Ginkgo) produce swimming sperm that is different than all other groups which produce sperm without swimming flagella.

Also, unlike other groups of gymnosperms, cycads have specialized pollinators, beetls.

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____ cells are required for almost all parts of the innate and adaptive immune responses to function properly.

Gelneren [198K]

Answer:

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