Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 29, Problem 9RQ
Trace a pathway of a phosphorus molecule from a phosphate-rich rock into a carnivore. What makes the phosphorus cycle fundamentally different from the carbon and nitrogen cycles?
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We have seen that energy is essential for life on earth. All organisms need energy to maintain their cellular processes. There are two basic ways of generating energy de novo, at the base of food webs. Describe the two primary ways that autotrophic organisms generate energy, including the original source of energy and the primary organisms that carry out each process.
explain the nitrogen cycle process
On a piece of paper draw the nitrogen and the carbon cycle for a terrestrial ecosystem. The cycles should show the detail of the transformation of the element, where the transformation occurs, as well as biotic and abiotic components.
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Chapter 29 Solutions
Biology: Life on Earth (11th Edition)
Ch. 29 -
1. Which trophic level(s) must be present to...Ch. 29 - Prob. 2MCCh. 29 - Denitrifying bacteria convert ammonia to nitrate...Ch. 29 -
4. Net primary production per unit area is likely...Ch. 29 - The effect of CO2 emissions from burning fossil...Ch. 29 -
1. Nearly all life gets its energy from _______...Ch. 29 -
2. Photosynthetic organisms are called either...Ch. 29 -
3. Feeding levels within ecosystems are also...Ch. 29 - In general, only about ______ percent of the...Ch. 29 - Prob. 5FTB
Ch. 29 -
6. During the nitrogen cycle, nitrogen gas is...Ch. 29 - Prob. 7FTBCh. 29 - Prob. 1RQCh. 29 -
2. What is a producer? What trophic level does it...Ch. 29 - 3. Define net primary production. Would you...Ch. 29 - Name the first three trophic levels. Among the...Ch. 29 - How do food chains and food webs differ? Which is...Ch. 29 - Define detritivore and decomposer and explain...Ch. 29 -
7. Trace the movement of carbon from one of its...Ch. 29 - Prob. 8RQCh. 29 - Trace a pathway of a phosphorus molecule from a...Ch. 29 -
1. Humans are omnivores who can feed on several...Ch. 29 - Discuss the contribution of human population...
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- Label the steps that contribute to the nitrogen cyclearrow_forwardIn terms of the nitrogen cycle and movement of electrons, what is the difference between nitrogen fixation and assimilatory nitrate reductionarrow_forwardIn the nitrogen cycle what are the organisms that break down nitrates and nitrites into nitrogen gas and return nitrogen to the atmosphere?arrow_forward
- In the nitrogen cycle the Assimilation process is a metabolic reaction: anabolic, catabolic, endergonic, exergonic, heterotrophic or autotrophic.arrow_forwardWhat incentives cause humans to capture nitrogen from the air and pump it into the nitrogen cycle? What are some consequences of human augmentation of the nitrogen cycle?arrow_forwardDiscuss nitrogen cyclearrow_forward
- Which fraction of phosphorus is available for photosynthetic organisms to directly uptake and use? Organic phosphorus in detritus Absorbed phosphorus in clay Phosphorus in minerals in rocks Soluble phosphorus in waterarrow_forwardWhat would happen if all microorganisms were to vanish from the nitrogen cycle? Give an explanation for your response.arrow_forwardIn the nitrogen cycle, ? Occurs when nitrogen gas is converted to form usable to plants, often by nitrogen-fixing ?arrow_forward
- Which of the following cycles involves the processes of cellular respiration and photosynthesis to move matter? Water cycle Carbon cycle Nitrogen cycle Phosphorous cyclearrow_forwardNitrogen is the most common element in the air. Why do bacteria play a role in the nitrogen cycle?arrow_forwardList the main features of the nitrogen cycle.arrow_forward
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