22. Grain is eaten by cows and cows are eaten by humans. If the energy transfer

Question

22. Grain is eaten by cows and cows are eaten by humans. If the energy transfer efficiency between eacb trophic level is 10 percent, how much grain is required to produce S0 kg of human biomass? a. 5 kg .50 kg c 500 kg d. 5,000 kg . 10,000 kg 23. Which of the followin g is an example of a mutualistic interaction? a Barnactes obtain safe haven by riding on a whale, while the whale is unaffected. b. A bacterium fixes nitrogen, thereby providing a nutrient for a plant, while the plant provides a stable environment for the bacterium. c. A virus infects a bird, thus reducing the bird's ability to raise a full nest of chicks. d. Jays nest in the lower branches of an oak and mockingbirds nest in the upper branches. e. rabbits eat grass and coyotes eat rabbits : 24. The female wasp of a particular wasp species lays its eggs in the developing seeds of an already :fertilized fig ovary. The larvae of this wasp eat (and kill) the seeds of the fig This wasp does not pollinate the fig or in any other manner benefit the fig. This interaction between figs and this wasp is best described as a. mutualism. c resource allocation d. a predator-prey interaction. e. competition. 25. Wolbachia is an endosymbiotic bacterium that can cause faster growth and more egg production in its host (usually an insect), which transmits the infection to all its progeny. Which term describes this relationship? a. mutualism. b. competitive exclusion. c. interspecific competitión. d. predation. , e. sexual selection 26. Many female swallowtail butterflies are not toxic, but they resemble butterflies that are toxic. : This phenomenon is known as a. character displacement. b. mimicry c. resource division. d. competitive camouflage. e. crypsis . 27. Two species of duckweed grow well when alone in the environment. When both are grown together, species A dominates and species B is quickly lost from the area. This is an example of a. character displacement b. competitive exclusion. c. herbivory d. trophic food web. e. mutualism.

Explanation / Answer

22. Since, at each trophic level, only 10 percent of energy is transferred, so the grain should have 5000 kg, in order to provide 10 kg human mass. The human are situated at third trophic level in this food chain. Hence, option d is correct.

23. Since, in mutualism, both the organism involved in relationship are benefitted from each other. Hence, option b is correct as plants and bacterium both are benefitted. Hence, option b is correct .

24. As in this example, wasp is benefitted and fig is not. This is a example of commenlaism.hence, option b is correct.

25. Wolbachia infect the insect. This is an example of predation .Hence, option d is correct.

26. This is an example of mimicry as , butterflies resemble toxic. Hence, option b is correct.

27. This is an example of competitive exclusion as one species remove the other species

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