Answer:
number 3 is carbon dioxide.
It would be the sinoatrial node and atrioventricular node.
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Umm.. Planting trees gives us more trees...we need trees because they provide oxygen,food(some trees), resources(such as paper), homes for animal(where eles will the squirrel live).
The answer is D. the curculitory system transports hormons.
How does the water needed to carry out photosynthesis get to leaves?
A. through chlorophyll molecules
B. through vascular bundles
C. through stomata
D. through mesophyll cells
