I think the correct answer among the choices listed above is the first option. The function of the nucleus is to store DNA. Majority of a cell's genetic material is found in this organelle. It is a characteristic of eukaryotic cells. Hope this answers the question.
Each cell normally contains 23 pairs of chromosomes. For a total of 46.
I think it's probably learned
A dichotomous key is two paired sentences that have contrasting characteristics. That's all i know