Answer:
Cell–cell interaction refers to the direct interactions between cell surfaces that play a crucial role in the development and function of multicellular organisms. These interactions allow cells to communicate with each other in response to changes in their microenvironment.
Answer:
I think the answer would be D,I'm not really sure though,hope I'm right,sorry if I,m not :)
Explanation:
Alleles. Alleles are the "same" genes, but provide a variation of the intended function.