How can the environment be organzied into levels from simple to complex

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Error analysis: what might be the reason that some of your percentages didn't exactly match your predicted results? gametes aren't responsible for inheritance. mice don't have large litters, so the sample size was not large enough. the wrong type of mice were used.

2polnis which of the following is an advantage of an in vitro experiment?me