I think the answer is all of the above......
dietitians -> need to learn about human body-> biology
zoologists-> need to learn about animals-> biology
so, since two answers are correct the answer is all of the above
If you're referring to wing color in terms of evolution, wing color can be determined by something as small as the color of trees that particular bird is around. Those with wings that match the tree color are most likely to survive because they are more hidden from predators.
Answer:
Many human and physical factors affect population distribution and population density across the world. Physical factors that affect population density include water supply, climate, relief (shape of the land), vegetation, soils and availability of natural resources and energy.
Restriction of blood flow, something is blocking the blood flow, heart has slowed down and is being pushed to hard.
