Answer:
your answer is antibodies reacting to foreign antigens.
Made of frozen gas.
Rocky leftovers
Smaller than planets.
Transportation is the cells way of brining in and expelling molecules, ions, et cetera. This is useful because a cell can receive what it needs at all times via transport but also have the ability to rid the cell of unnecessary molecules that aren't needed.
1) Independent assortment during metaphase I /anaphase I
<span>2) Crossing over during prophase I
3.) </span><span>Random mutation during replication
( I gave you three ways).</span>
