If an organism has 4 chromosomes in the nucleus of one of their body
cells, how many chromosomes would they have after mitosis?

Regarding most of the narrator’s story, which word best describes the tone?

How does food concentration affect yeast activity

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled