It won't. Evolution is fake. Genetic entropy is the truth.
Second option/ the gametes produced by meiosis allow for closing organisms
Your answer is gravitational forces
By warming up your muscles (I am assuming you mean by stretching and doing jumping jacks and such, not sitting yourself in front of a heater...) you will have a better overall workout. Your muscles will be ready to work and you will not tire as fast. Also, your muscles will feel better the next day because you got them ready to work out.
An organ is a group of tissues working together to perform specific functions. An example of an organ is the heart.
