Answer:
The color
Explanation:
Answer: The kidneys!
B. Knowledge and valuable resources are shared among scientists.
C. An experiment is repeated several times to verify the results.
D. Multiple forms of evidence are used to support a conclusion.
the right answer is b
Eliminate
B) Oxygen is used for respiration and carbon dioxide is a waste product.
C) Nitrogen is used for respiration and carbon dioxide is a waste product.
D) Carbon dioxide is needed for respiration and oxygen is a waste product.