In closed circulatory systems, how are nutrients and oxygen transported from the blood to body cells? Does this transport occur in all parts of the system? Explain.

In each transformation of energy , some energy what?

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

Which of the following explains why a tree is often used as a model to represent the principle of common descent