What are the locations in the cell cycle where proteins can initiate or stop the next phase of the cycle called?

Which organelle breaks down sugar molecules that supply energy to the cell ?

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.

Were you able to observe the nucleolus in any of the cells if so which ones