Cells are the most simple level of organization, as tissues contain cells, organs contain tissues and systems contain organs, so R would be your answer.
B. is the answer hope this helps
Because they let any organisms to grow,develop,survive, and reproduce.
Answer:
B. Decrease genetic diversity
Explanation:
All of the above
Differentiation and specialisation are basically the same thing, and are caused because differences in gene expression cause different proteins to be produced that make up different types of cells. This also allows for development- for example as you get older a different genes are expressed to make your hair go gray
Let me know if you have any questions!