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user100 [1]
3 years ago
15

Guard cells control which event?

Biology
1 answer:
Rama09 [41]3 years ago
4 0
That would be C gas exchange in leaves.
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Cell structure and processes
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astra-53 [7]

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The correct answer is 4,960,000

Explanation:

If a yeast cell divides into two yeast cells in 120 minutes that means a yeast cell needs 2 hours to get double. So according to the question 2 hours ago a yeast colony consisted of 310,000 cells that means the present colony should have 620,000 cells.

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Therefore after 6 hours from now, the approximate number of yeast cells will be 4,960,000.

3 0
3 years ago
if we use a cscl gradient to test the density of various nucleic acids, both rna and dna-rna hybrids are more density than just
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The primary technique employed in molecular biology is the extraction of DNA, RNA, and protein. Scientists can separate materials according to size, shape, and density by using density gradient centrifugation. Isopycnic centrifugation, a sort of density gradient centrifugation that Meselson and Stahl developed, employed a cesium chloride solution to separate DNA molecules solely on the basis of density. Because DNA has hydrogen bonds between its strands, which makes it less dense than RNA, RNA has a far larger density than DNA. RNA can be obtained at the test tube's bottom using a CsCl density gradient and high centrifugation, whereas DNA can be recovered in the middle layer.

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The answer is A. A water molecule
because you’re removing H2o
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