Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
Answer:
The "X" or "Y" gene that determines whether you will be a boy or a girl is an example of a chromosome .
Explanation:
The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. Once in the blood, the food molecules, including fat molecules, are routed to every cell in the animal's body.
Meiosis would be most beneficial to a species in a situation where an organism falls prey to many efficient predators. Answer:a)<span>Meiosis: numerous daughter cells produced would increase the species' population.
</span>The species needs to evolve quickly, and the best way to do that is to shuffle existing mutations through sexual reproduction.
