Answer: Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. ... Directional selection does the “heavy lifting” of evolution by tending to move the trait mean toward the optimum for the environment.
The major differences are that fats are solid at room temperature while oils are liquid, and that oils are usually of plant origin while fats are of animal origin.
Adjacent cells can signal others by direct contact, while nearby cells that are not touching can communicate by the release paracrine signals.
Hope this helps,
Davinia.
Mitosis is the reproduction of regular cells, and meiosis is the reproduction of sex cells.
