Question: Occasionally, subjecting a plant to photoflood and a fan will produce a lower rate of transpiration than exposing it solely to a photoflood. Explain why these conditions might produce a lower rate of transpiration in the plant.

Question: The pelle gene of D. melanogaster is a maternal-effect gene. Recessive peller mutations result in embryonic lethality. From the cross shown below, in what generation would embryonic lethality first occur? In that generation, what fraction of embryos would be inviable?

P0 peller/peller ? x pelle+/pelle+ ?

Question: Why is alcohol effective against some viruses and not others?