Would a calcium deficiency be more likely to cause excess water loss or a carbon dioxide shortage for

a plant (hint: think of the stoma)? What will be an ideal response?


A calcium deficiency would be more likely to cause excess water loss. When plants are osmotically
stressed, the first step in closing the stomata is to have calcium enter the guard cells. Without calcium,
closing the stomata could not occur. On the other hand, the light-triggered opening of the stomata to
allow carbon dioxide to enter does not require calcium

Biology & Microbiology

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One important difference between amniocentesis and chorionic villus sampling is that ____

a. chorionic villus sampling is more routine b. amniocentesis can diagnose chromosome disorders, while chorionic villus sampling cannot c. chorionic villus sampling can be done earlier in the pregnancy than amniocentesis d. maternal risks are higher with chorionic villus sampling e. the risk of miscarriage is higher with amniocentesis than with chorionic villus sampling

Biology & Microbiology

Which country has the biggest ecological

footprint?

a. France b. United States c. China d. India e. Canada

Biology & Microbiology

You have isolated a new eukaryotic organism which is unicellular and performs photosynthesis. The organism is most likely classified as a(n)

A) fungi-like protista. B) fungus. C) bacterium. D) plant-like protista. E) animal.

Biology & Microbiology

Region between Fab and Fc that allows swiveling of the Fab

A. Fab B. Fc C. Hinge region D. Complement binding site E. Disulfide bonds

Biology & Microbiology