What must occur in order for a hanging valley to form

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

During binary fission, what events must occur before the cell splits into two new cells?