Which condition(s) below must be met for a population to be in Hardy Weinberg?
1. no random mating occurs
2. natural selection occurring
3. mutation occurs
4. population is large
5. individuals and their genes immigrate and emigrate.
I just don't understand this question. Does it want the 5 requirements or somethings else.

For a population to be in Hardy Weinberg, option 1, 2 , 4 and 5 are very crucial

Explanation: Hardy Weinberg principle of population (equilibrium) focuses on variation in the gene of an individual, this principle states that allele and genotype frequency in a population will remain constant if there are no disturbing factors like; Natural selection, mutation, non random mating etc.

This means that for a genotype of a population to be maintained there should be no selection of mating individuals, mutation should not occur, there should be random mating, and they should remain in the same environment.. This will ensure that individual produced in next generation looks like their parents.

a- all cells come from pre-existing cells