Antigens determine blood type
Answer:
They pick up oxygen from the lungs and drop off oxygen to the cells through the capillaries
Well that would be the moss in the pond
No, this is false!
Renewable resources can be syntesized by humans, or not: some of them can, and some can't. This is not what makes them renewable, instead it's the fact that they will still be present in the nature after usage - they will be replaced (the sun will still shine tomorrow even if we harvest its power).
<span>The birth of more offspring than can survive.</span>
