3. Which trophic level converts energy into biomass with the highest food-chain efficiency?A. the fifth trophic level (quaternary consumers)B. the fourth trophic level (tertiary consumers)C. the third trophic level (secondary consumers)D. the second trophic level (primary consumers)E. the first trophic level (producers)

The sequential transfer of energy and nutrients in the form of food from one organism to another is…

Answered: 3. Which trophic level converts energy…

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter46: Ecosystems

Section: Chapter Questions

Problem 10RQ: The loss of an apex consumer would impact which trophic level of a food web? primary producers...

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The amount of energy available at the highest trophic level in an ecosystem is determined by: a. only the gross primary productivity of the ecosystem. b. only the net primary productivity of the ecosystem. c. the gross primary productivity and the standing crop biomass. d. the net primary productivity and the ecological efficiencies of herbivores. e. the net primary productivity and the ecological efficiencies at all lower trophic levels.
The loss of an apex consumer would impact which trophic level of a food web? primary producers primary consumers secondary consumers all of the above
Organisms at the first trophic level ________. a. capture energy from a nonliving source b. are eaten by organisms at lower trophic levels c. are shown at the top of an energy pyramid d. are consumers
1. Define biotic and abiotic factors of the environment. Give an example of each. 2. How do ecologists define the term ecosystem? 3. State the competitive exclusion principle. 4. Identify three different types of consumers. Name an example of each type. 5. Describe the role of decomposers in food webs. 6. What is a biogeochemical cycle? Name an example.
2. The trophic relationships in real biological communities are much more complex than a simple food chain. These more complex trophic relationships are shown in a food web. This diagram shows a small part of a food web. Notice that the food web contains multiple food chains. A. Circle the organisms in one of the food chains in this food web. B. Label the producer in the food chain you circled. mountain lion C. Explain why the hawk in this food web is a trophic omnivore, even though it does not eat both plants and animals. deer atrod ugog 10ods nous W snake rabbit trees hawk mouse- grasses frog Z cricket bas to AnidT A 46
1. Billy is stranded on an island. He has unlimited access to water, six chickens, and a few bags of corn. He is considering his options for how to survive on the island until he is rescued. Draw a model of the food web and the trophic pyramid on the island for each of these three options. Option A: Feed all the corn to the chickens and eat their eggs. Trophic Pyramid Food Web Option B: Share the corn with the chickens. Eat their eggs, then eat the chickens when the corn runs out. Food Web Trophic Pyramid Option C: Eat the chickens first, then eat the corn. Food Web Trophic Pyramid
3. An ecologist studying the trophic structure of a lake constructed the pyramid of biomass below. He is puzzled because the bottom of the pyramid (the producer biomass) is smaller than the next level (the primary consumer biomass). Biomass Top carnivores 1g/m3 Carnivores 12 g/m3 Herbivores 25 g/m3 Producers 10 g/m3
6.Which of the following is a true statement? a. There are always more heterotrophs than autotrophs in an ecosystem b. Only 10% of the energy is transferred from one trophic level to the next -- because of this energy loss, there are always more autotrophs c. In numbers pyramids, there are more autotrophs but no in biomass pyramids d. The number of species increases as the trophic level increases answer explain
What is the trophic position of SPBa. primary producerb. primary consumerc. secondary consumerd. tertiary consumer13
b Primary consumer 2nd trophic level; herbivores C. Secondary consumer: third trophic level, predators eat herbivores d. Tertiary consumer 4th trophic level; predators eat predators 9. Identify whether the following symbiotic relationships are an example of parasitism, mutualism, or commensalism| a. A cleaner fish removes parasites off another fish. • parasitism b. A tick feeds off the blood of a moose. C. A bird makes a nest in a thorny tree to protect its eggs from predators. 10 Define COMP CTITIONI(4 -
The direction of the arrows in a trophic chain (as the one in the figure below) represents... A E O B) direction of movement of matter O Both B and C O A, B, and C O A) direction of consumption, from higher level consumer to lower level consumer O C) direction of movement of energy O Both A and C
4. All of the following organisms in a marine food web, close to the Arctic Circle, would properly be classified as heterotrophic animals, with the exception of: A. the harp seal (a quaternary consumer species) B. the polar bear (a quinary consumer species) C. the squid (a secondary consumer species) D. the flatfish (a tertiary consumer species) E. phytoplankton (a producer species)

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