Answer:
all of the above
Explanation:
Epigenetic alterations are modifications of the genome transmitted during cell division, which do not involve changes in the DNA sequence, are hereditary and are capable of modifying gene expression. In addition, they are temporary modifications that allow DNA to be transcribed and have the ability to move histones to open or close a chromosomal region. There are three main mechanisms of epigenetic alterations: DNA methylation, histone modifications and genomic imprinting.
The cartoon shows Metaphase I.
Metaphase I has homologous chromosomes that line up at the middle while Metaphase II has single chromosomes that line up at the middle.
It depends most packages take 2-3 weeks so I’m guessing about 4 or 5?
They developed to be protected by the hard shell from parasites and ther predators.