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<em><u>1)"the regard that something is held to deserve; the importance, worth, or usefulness of something."</u></em>
<em><u>2)"a person's principles or standards of behavior; one's judgment of what is important in life."</u></em>
<em>BASED ON THIS DEFINITION I CAN DETERMINE THAT</em> YOUR ANSWER IS A THE MEASURES USED TO DETERMINE HOW GOOD A PERSON IS.
The way you know the subject of the sentence is plural is because it takes a plural verb. You can see that the subject of the sentence is <em>the ova </em>(plural for of Latin word <em>ovum</em>, <em />meaning egg cell), and the verb it takes is <em>undergo </em>(plural)<em>, </em>and not <em>undergoes, </em>which would be singular.
<span>bringing attention to the unchecked use of pesticides, pesticides’ harmful effects on the environment, and writing laws to protect the environment
b.</span>