Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 28, Problem 4FTB
In general, only about ______ percent of the energy available in one trophic level is captured by the level above it.
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Chapter 28 Solutions
Biology: Life on Earth
Ch. 28 -
1. Nearly all life gets its energy from _______...Ch. 28 -
2. Photosynthetic organisms are called either...Ch. 28 -
3. Feeding levels within ecosystems are also...Ch. 28 - In general, only about ______ percent of the...Ch. 28 - Prob. 5FTBCh. 28 -
6. During the nitrogen cycle, nitrogen gas is...Ch. 28 - Prob. 7FTBCh. 28 - Prob. 1RQCh. 28 -
2. What is a producer? What trophic level does it...Ch. 28 - 3. Define net primary production. Would you...
Ch. 28 - Name the first three trophic levels. Among the...Ch. 28 - How do food chains and food webs differ? Which is...Ch. 28 - Define detritivore and decomposer and explain...Ch. 28 -
7. Trace the movement of carbon from one of its...Ch. 28 - Prob. 8RQCh. 28 - Trace a pathway of a phosphorus molecule from a...Ch. 28 - Trace the movement of a water molecule from the...Ch. 28 -
1. Humans are omnivores who can feed on several...Ch. 28 - Define and give an example of biological...Ch. 28 - Discuss the contribution of human population...Ch. 28 - Describe what would happen to a population of deer...
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- Organisms at the lowest trophic level in a tallgrass prairie are all _______. a. two steps away from the original energy input b. autotrophs c. heterotrophs d. both a and b e. both a and carrow_forwardThe process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called _________. a. dead zoning b. eutrophication c. retrophication d. depletionarrow_forwardThe trophic levels found in this ecosystem are decomposers, producers, consumers, secondary consumers, and top predators. Which one of these converts light energy into chemical energy?arrow_forward
- Availability of energy is less for entities at higher trophic levels.Why?arrow_forwardWhich trophic level is most affected by fires in Gorongosa? Explain. They gave me four options. First/producers, second/primary consumers, third/secondary consumers, or fourth/tertiary consumers.arrow_forwardIn an ecosystem with four levels producers, primary consumers, and two higher-level consumers describe where the decomposers operate within the context of these trophic levels. Can you give me two examples?arrow_forward
- Mass of living matter at a trophic level in an area at any time is called as what?arrow_forwardEnergy transferred from one trophic level to the next in an ecosystem is measured in calories, numbers, and in biomass. If a rangeland has a biomass of 100, 000g/m2 from the grass, how much biomass will be available in human beings who eat the cow that eat that grass?arrow_forwardEnergy flows from one trophic level in the food chain to another, at each level only _____% (10, 1, 90) of the energy or biomass is transferred efficiently for use in the next level. The rest is either expended by cellular respiration or lost as feces.arrow_forward
- The mass of living material at a trophic level at a particular time is called as what?arrow_forwardWhich of the following ultimately feeds at every trophic level? Producer Primary consumer Secondary consumer Tertiary consumer Decomposers/Detritivoresarrow_forwardTrophic levels Part A) In food chains and webs, what trophic level must you have more of than others. Part B) Each trophic level has how much LESS energy? Part C) Can an organism fill more than one trophic level? Explain your answer.arrow_forward
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