Answer:
As carbon dioxide concentrations increase, the pores don't open as wide, resulting in lower levels of transpiration by plants and thus increased water-use efficiency.
Explanation:
Answer:
The advantages of selective breeding can include improved quality and higher ... breeding are positive for humans but an awareness of the disadvantages can help
Explanation:
Answer:
A
Explanation:
I'm pretty sure it's A, but I don't know the context in which it's talking about.