I believe the correct answer would be C. Sartorius i believe this is the answer, after doing some research on gO0gLe.
Well first i just wanna say that life on mars has been discovered,not little green men but Bactria found on the surface and small traces of water have been found as well. some forms of life need little water to survive (like bacteria) but they still need water so yes there is water on mars the question is will we find it.
It's C, the catalyst remains unchanged through a reaction.
Answer:
an interacting group of various species in a common location
Explanation:
DNA is the correct answer.
Hope it helps!