F09_BIOL1010_B_midtermKey

A these organisms possess many individual ommatidia

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Unformatted text preview: questions. A. B. C. D. E. Pick me!!! No X No X No X No X 2. Which of the following best describes how an organism like a limpet or flatworm, that lacks image ­ forming eyes, can use light to sense surroundings? A. These organisms possess many individual ommatidia that act together in vision. B. Photoreceptor cells allow light to be sensed, and surrounding tissues may provide information about the direction of light. C. Photosynthetic proteins can capture photons of light, and reactions convert the energy to chemical form. D. The eye in such animals resembles a vertebrate eye, with lens and retina, but the organism lacks the brain necessary for processing images in the same way. E. Phytochrome molecules respond to certain wavelengths of light, and can cause certain physiological responses based on the state of this photoreceptor molecule. 3. Which of the following is NOT an example of how living organisms can use/exploit light (in a beneficial way)? A. B. C. D. E. Daylight affects physiological processes, such as appetite and sleep, in many animals. Certain flowering plants will only flower when day (or night) length reaches a particular limit. Some wavelengths of light can damage biological molecules like DNA. Certain animal pollinators are attracted to flowers of a particular colour. Plants use light in photosynthesis. 4. Abiotic factors affecting the diversity of organisms include all of the following EXCEPT A. B. C. D. E. sunlight. temperature....
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This note was uploaded on 10/04/2013 for the course CHEM 1001 taught by Professor Hempstead during the Fall '08 term at York University.

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