As we know, vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body, which is a training for your body so if a real antigen attacks it, it will be trained and kill it with ease. Same thing with the boxer, he is training with dead weight so when he has a boxing match he will be ready and win with ease.
(1) A system can refer to a organs that work together for digestion.
(2)A system is a set of rules, an arrangement of things with a group of related things that work toward a common goal.
Answer:
it is extrusive igneous rocks
Eukaryotes have higher survival rates, they also have the ability to be more self sustaining, as well as have more stable periods of homestasis than non-eukayotes.
Answer:
Question 17: B: They may provide evidence that Pennsylvania was once covered by warm ocean waters since most corals are presently found in these environments.
Question 14: I think the answer for this question might be A. But I'm not sure.
Question 10: D: Plates move toward each other and volcanic mountains form.
