The first one with the boxing crab and anemone is mutualism.
The second one with the dog and flea is parasitism.
Here are the 3 parts of the cell theory:
1. Cells are the basic building blocks of any living things.
2. Any living thing is composed of more than 2 cells.
3. New cella arise from the old
Cell division is when the cell divides its chromisomes. Replication is when it replicates or makes another dna molocule like it.