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Unformatted text preview: 1. Which of the following statements regarding the conceptual limitations of a food web is true? a. Food webs are static, and actual trophic interactions may change over time. b. Most food webs fail to account for mutualisms. c. Food webs often ignore the critical role of microorganisms. d. Both a and b e. All of the answers 2. In Berlow's studies of the effects of whelk densities on barnacles, when whelk densities were high, the net effect on barnacles _______. When whelk densities were low, the net effect on barnacles _______. a. was always positive; depended on the barnacle density b. was always positive; was always negative c. depended on the barnacle density; was always positive d. was always negative; was always positive e. was always negative; depended on the barnacle density 3. In Paine's demonstration that removing the top predator in an intertidal food web led to lower...
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This note was uploaded on 06/28/2011 for the course BIO 22 taught by Professor Vaj during the Fall '09 term at University of Central Florida.
- Fall '09