They do, but very slowly. Mostly when growing or wind is hitting it.
Answer: the tails are hydrophobic and the heads are hydrophilic
It is called peristalsis movement.
Answer:
Reproductive cells have half the amount of chromosomes than body cells
Explanation:
I think that you are talking about body cells when you say "most cells in an organism." If that is the case, then the reproductive cells, sperm and egg cells, have half the amount of chromosome than body cells.
For example: Human body cells have 46 chromosomes. Human reproductive cells has 23 chromosomes.
In sexual reproduction, each parent gives 1/2 of a full set of chromosomes to create the full set needed for an organism.
First one is A
Second one is B
Hope this helps !