Which of the following is the distinguishing feature of prokaryotic cells? Prokaryotic cells have a nucleus.
Prokaryotic cells do not have a cell wall.
Prokaryotic cells do not have a nucleus.
Prokaryotic cells have mitochondria.

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

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

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation