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.
D!!
after the geological even the farthest layer down is the oldest
A scientific explanation for a set of observations that can be tested and is written with an "if/then" statement is referred to as hypothesis and is denoted as option B.
<h3>What is Hypothesis?</h3>
This is defined as the proposed explanation for a particular phenomenon before several experiments are conducted by others in different parts of the world to confirm its authenticity.
It employs the use of words such as "if/then" which shows its unproven status which is therefore the reason why it was chosen as the most appropriate choice.
Read more about Hypothesis here brainly.com/question/606806
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Answer:
Mudslide
Explanation:
This is an example of a mudslide. Because it is on a mountain and it is sliding down hill that is why it is called a slide and because it is picking up eroded rocks, mud and grass it is called a mudslide.
