Look carefully at the model. during a drought, there is less water available for the plants. there is less runoff and less infiltration. during a drought, less water is returned to the atmosphere by the plants through and there is a decrease in the plants' rate of a) respiration; photosynthesis b) photosynthesis; condensation c) transpiration; photosynthesis d) photosynthesis; transpiration

Option (C) is the correct answer.

Explanation:

A process in which plants absorb water with the help of roots and through the pores in leaves, plants give off water vapor. This process is known as transpiration.

Thus, we can conclude that during a drought, less water is returned to the atmosphere by the plants through transpiration, and there is a decrease in the plants' rate of photosynthesis.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."