Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation:
I have no straight answer with ABDE as of your lack there-of. But here.
Gene flow is the introduction of genes/alleles between populations. An example is a flower having it´s pollen carried by a bee. The bee then introduces it (intentional or not.) to other flowers.
Another example is a pack of gray wolves suddenly having a different wolf introduced. *As long as it can breed, that is* They will slowly incorporate the new alleles/genes into the pack.
I wish you luck young lad.
Answer:
There would be no life (except for viruses [if they are considered to be alive]).
Explanation:
These cells are the "building blocks" of life, and all have RNA or DNA in them and a membrane around the outside. The only example of something "alive" without cells might be viruses (like what causes chickenpox or the flu) which are just packets of protein and DNA.
Because cells are created for different task, such as cells in the muscle are different than cells located in the heart. This is called Differentiation.