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Serggg [28]
2 years ago
7

Guard cells _____.

Biology
2 answers:
Mama L [17]2 years ago
8 0
They control or regulate the rate of transperation by opening and closing the stomata.
solong [7]2 years ago
5 0

Answer: Guard cells control when stomata opens and closes

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Number the phases of the moon in the order that they occur, beginning with the new moon as number 1.
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Explanation:

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3 years ago
Xylem _____.
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5. What is another word for Lithogenous
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5 0
3 years ago
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

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It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
2 years ago
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