B.https://www.mansfieldct.org/Schools/MMS/staff/hand/genNaturalselection06.htm this is where I got my source.
Because the cells always diverted when break down
The proposed kingdom of euglenozoa includes protists with one or two flagella emerging from an anterior pocket
This flagella give them the ability to swim/moved throughout the water where they usually live
hope this helps
I think the organisms in that ecosystem would most likely have an problem in there ecosystem because if any animal adapted to that environment they would most likely be already adapted to that environment