The answer is A- sperm and egg. gametes are reproductive cells in mammals, so sperm and egg would be the correct.
Answer:
Explanation:
You list the references in order of the last name of the author. For instance a book by Zachary Adam would come before a book by Adam Zachary. (Just an example)
Adam, Zachary. "Works Cited Example 1." Place of Publication: Publisher, Year.
Zachary, Adam. "Works Cited Example 2." etc.
A dichotomous key is two paired sentences that have contrasting characteristics. That's all i know