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Verdich [7]
3 years ago
8

What could prevent sperm from reaching and fertillizing an egg?

Biology
1 answer:
Aleks04 [339]3 years ago
6 0
Numerous barriers can prevent sperm from reaching and fertilizing the egg, this can be that the Sperm may be defected, or lack the required number of mitochondria needed to help move the sperm. Also, if sperm had already fertilized the egg, there is a change that takes place to the membrane surrounding the egg preventing further sperm from fertilizing.
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- Chargaffs rule states...
denis23 [38]

Answer:

Option C

Explanation:

For chagarff's rule, it clearly states that DNA from any cell of any organisms be it prokaryotes or eukaryotes should have the basic 1 (purine): 1 (pyrimidine) ratio. Particularly, amount of adenine should be equal to thymine, and guanine equal to cytosine. This is in particular reference to organisms that have double stranded DNA.

5 0
3 years ago
An operational definition is used for a behavior so that
dezoksy [38]

An operational definition is used for a behavior so that the behavior can be properly described and understood. Without an operational definition, it would be difficult to describe behavior without being subjective. Therefore, behavior cannot be understood and cannot be correctly addressed. It is also important to understand how behavior functions so that the antecedents and consequences of behavior can be observed. Thus, what reinforces or affects the behavior can be better understood. Lastly, an operational definition is objective and specific, therefore, behavior can be described across different settings and times.

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3 years ago
How do moving glaciers change the surface of the earth??? please help!!!​
Drupady [299]

Answer:

Glaciers are massive bodies of ice that move across the surface of the Earth like rivers. As glaciers move they change the surface of the Earth by wearing away loose rocks and soil and depositing them somewhere else.

Explanation:

5 0
3 years ago
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A spectrum for a given element is unique for that element. why is that so?
astra-53 [7]
The correct answer is B.
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5 0
2 years ago
PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!
NikAS [45]

Answer:

The body regulates those levels in an example of homeostasis. When levels decrease, the parathyroid releases hormones. If calcium levels become too high, the thyroid helps out by fixing calcium in the bones and lowering blood calcium levels. The nervous system helps keep homeostasis in breathing patterns.

Explanation:

Hope this helps :)) Please mark brainliest :))

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