Guard cells are responsible for allowing carbon dioxide to enter a plant. They also control the release of oxygen and water to the atmosphere. Based on this description, where are guard cells located?
A. within the stem
B. along the root system
C. the interior portion of leaves
D. on the surface of leaves

Why should the united state be concerned about air pollution in china?

Which would be the most useful source of evidence to support mcneill's contention?

Pls in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.