B because yea this has to be 20 letters long
Freshwater, ocean water, and terristrial.
There are three broad categories of ecosystems based on their general environment, as those that were mentioned above. Within these broad categories are individual ecosystem types based on the organisms present and the type of environmental habitat.
C mitochondira and chloroplasts because they replicate by binary fission which is the same as prokaryotic cell division
I believe the answer would be Crossing Over.
Hope this helps.
