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Lab Report 8: Energetics: Photosynthesis, Respiration,and Fermentation

Some leaves are variegated. That is, they display colors otherthan green (e.g. the Coleus plant).

Still other plants have leaves that contain areas of white. Usethe information from the lab to

identify the probable source of ATP for plant cells located inthe white regions of the leaf.

There is a mutation in corn that produces albino (white) plants.What is the potential for long-

term survival of these white corn plants? Explain.

Use the summary equations for photosynthesis, respiration, andthe interaction of water and

carbon dioxide to explain the color changes observed with Elodeagrown in Phenol Red.

Are yeast cells autotrophs or heterotrophs? Explain why youthink so.

Explain the following statement.

All food energy ultimately comes from the sun.

Combustion of organic molecules (e.g. wood, fossil fuels, etc.)produces carbon dioxide, carbon

monoxide and other substances. Carbon dioxide and other gasesare so-called greenhouse gases that can contribute to globalwarming and climate change. Based on the experiments and

demonstrations we have done today, what is an other effect mightincreased environmental

carbon dioxide might have on aquatic environments? (Hint: PhenolRed color change)

What kinds of approaches might reduce the amounts of carbondioxide accumulating in the

atmosphere?

What is the meaning of the quotation at the beginning of thislab exercise?