Microscopes helped scientists to observe all of the following characteristics EXCEPT: A.
which organisms have a nucleus

B.
which organisms have a cell wall

C.
which organisms sexually reproduce

D.
which organisms are multicellular or unicellular

PLEASE HELP IM NOT THAT GOOD IN SCIENCE!!!

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.