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WINSTONCH [101]

3 years ago

14

The cell cycle: A) is the same length of time for all cells. B) is when a cell dies. C) is different lengths of time for differe

nt types of cells.

1 answer:

ahrayia [7]3 years ago

6 0

I believe the answer is C) is different lengths of time for different types of cells.

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You measure the pH of your backyard soil and find it is 7. You measure the pH of your friend's backyard soil and find it is 4. H

olchik [2.2K]

Answer:

1000 times.

Explanation:

Hello,

In this case, since the pH is defined by:

$pH=-log([H^+])$

If we want to compute the concentration of hydrogen we must write:

$[H^+]=10^{-pH}$

Thus, for both the backyard soils we compute:

$[H^+]_{pH=7}=10^{-7}=1x10^{-7}M$

$[H^+]_{pH=4}=10^{-4}=1x10^{-4}M$

It means that:

$\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}} =\frac{1x10^{-4}M}{1x10^{-7}M}\\ \\\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}}=1000$

It means that the concentration of hydrogen at a pH of 4 is 1000 times greater than the concentration of hydrogen at a pH of 7.

Regards.

4 0

3 years ago

In order for the virus to reproduce, the virus must enter _____

Anastaziya [24]

Your body through the cells

7 0

4 years ago

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Which of the following correctly characterizes one of Earth's atmospheric layers?

nignag [31]

Answer:

it is A layer A is the stratosphere where meteors are found

Explanation:

8 0

3 years ago

What is regeneration?

masya89 [10]

Regeneration is the ability to gain something back again.

5 0

3 years ago

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Without crossing over:

gregori [183]

Answer:

D. Genetic recombination would not occur.

Explanation:

If this did not occur, all individuals would be identical to its parent unless a mutation occurred.

5 0

3 years ago