Answer:
2.They are specialized to do certain tasks
Answer;
-Reproduction;
Explanation;
-Mitosis is a shape of cell division that outcomes in two daughter cells which might be genetically identical to every other and to the unique cell.In unicellular organisms together with micro organism, mitosis is a kind of asexual duplicate, making equal copies of a unmarried mobile.
- Single-celled or unicellular organisms use cell division as their method of reproduction. Mitosis is a type of asexual reproduction, making identical copies of a single cell. Cells make identical copies of themselves through mitosis.
I believe they cannot start with big trees and bushes because the there is not enough nutrients in the soil, so instead pioneer species pave the way for primary succession.
Answer:

point mutation, change within a gene in which one base pair in the DNA sequence is altered. Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations