I believe that the answer should be D. Cell cycle.
Answer:
Clubmosses
Explanation:
I don't really have an explanation
Answer:
Variation
Explanation:
there are multiple different types of species.
Answer:
A tick sucking a deer's blood
Explanation:
All other examples show mutualistic relationships - both species benefit from the relationship. With parasitism the one species benefits (the tick) while the other suffers (deer).
Cassini was the name of the satellite.