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cluponka [151]
3 years ago
9

What is natural selection and what are its effects on allele frequencies? (Due at 11:59)

Biology
1 answer:
Roman55 [17]3 years ago
6 0
Natural selection can cause changes in allele frequencies when adaptations that are caused by natural selection cause fitness-increasing alleles to become more common in the population
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If the number of phytoplankton decreases, what happens to the amount of carbon dioxide in the atmosphere?
Salsk061 [2.6K]
It would substantially increase as they are responsible for 1/3 of the earths Oxygen and without them "eating" up the CO2 there would be an increase of it in our Atmosphere and a decrease in Oxygen <span />
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Rose bushes usually rebloom from year to year. Roses, therefore, would be considered
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A, annuals, is the correct answer.                                                                                                                                             
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Read the example. A phone rang in the concert hall the orchestra stopped playing. What common sentence-construction error does t
LekaFEV [45]

Answer:

The correct answer is "run-on sentence".

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3 years ago
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the nervous system that controls respiration is called autonomic because it a. uses nerves of the body. b. conducts impulses. c.
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3 years ago
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What are "blank" cells called?
JulijaS [17]
If you are checking a cell for a zero value and the cell is blank, the test evaluates to true. For example, if you have the following formula in cell A1 =IF(B1=0,"zero","blank") and B1 is blank, the formula returns "zero" and not "blank" as expected.

If the range might contain a blank cell, you should use the ISBLANK function to test for a zero value, as in the following example: =IF(ISBLANK(B2),"blank",IF(B2=0,"zero","other")) Note that the above formula returns "zero" if there is a zero value in the cell, "blank" if the cell is blank, and "other" if anything else is in the cell.

You must always use the ISBLANK formula first before you test for a zero value. Otherwise you will always return a "true" for the zero value, and never get to the test for the ISBLANK formula.
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3 years ago
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