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tamaranim1 [39]
3 years ago
10

I don't have any friends anymore. Someone help me out?

Biology
1 answer:
iren [92.7K]3 years ago
4 0
I’ll be your friend!
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How Is the Nature of the Geologic Activity That Is Observed Near a Plate Boundary Related to the Type of Plate Interaction That
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Answer:

b

Explanation:

fdsbjGEbrbguigbi

6 0
3 years ago
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A hummingbird sucking nectar from a flower is an example of .......?
Deffense [45]
Check out this website http://science.jrank.org/pages/3421/Hummingbirds-Biology-hummingbirds.html
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3 years ago
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The semilunar valves of the heart open at the onset of the ejection period. Approximately what percentage of the stroke volume i
mr Goodwill [35]

The percentage of the stroke volume is ejected during the first quarter of systole will be approximately 60% to 65%

<u>Explanation:</u>

The time interval between the atria contraction and the relaxation of ventricles are called as a Cardiac cycle. Systole denotes the heart contraction during the blood pumping. Diastole refers to the heart relaxation when the blood is filled in the heart chambers. The total blood is not fully pumped by the ventricles.

Instead they will pump only a proportion of blood in each of the cardiac cycle.  The ejection fraction refers to the proportion of the intraventricular volume that is received as a output in circulation process. A human with normal heart functioning can have approximately 60-65%. This is known to be stroke volume. The blood volume that is ejected is strove volume.

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3 years ago
Most cells that experience mutations or damage _________. Select one: a. become cancer b. undergo apoptosis c. become a malignan
ANTONII [103]
A. Become cancer because in the process of mitosis (cell replication) idlf the cell replication does not work properly and keep going on and on it will begin creating mutations to help it replicate causing cancer to happen.
Ex: let's say you have a paper cut. Your blood cells must replicate in order to close that gap in your body. They begin replication but if they get out of control and begin creating mutations it will turn into cancer.

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3 years ago
Hakeem is testing the effects of sunlight on samples of soil. Which of these actions would introduce confounding variables into
satela [25.4K]

A confounding variable refers to an external effect, which modifies the influence of an independent and dependent variable. This extraneous effect is used to affect the outcome of an experimental design. The confounding variables can ruin the experiment and can generate unnecessary outcomes.  

In the given case, confounding variables can be introduced by testing multiple hypotheses at a time and by using distinct kinds of soil in each of the samples.  


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