Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 46, Problem 4SQ
Summary Introduction
Concept introduction: An ecosystem is an arrangement of organisms and their physical environment, all interacting through a one way flow of energy with respect to the cycling of nutrients. It is an open flow system that requires ongoing inputs of energy and nutrients. In an ecosystem, the trophic level represents the position of an organism in a food chain. The flow of energy through an ecosystem begins with the primary production.
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The quantity of available nutrients ____________- from the lower levels ofthe energy pyramid to the higher ones.a. increases
b. decreases
c. remains stable
d. cycles
The amount of energy available to heterotrophs is ________.
Select one:
a.
net primary productivity (NPP)
b.
always equal
c.
kilocalories per unit area
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gross primary productivity
n lab 8, we grew colonies of yeast on plates with 1% and 5% glucose to test the effects of nutrient availability on yeast growth. Available nutrients within an environment would be considered a/an ________________.
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growth factor
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abiotic factor
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Chapter 46 Solutions
Biology: The Unity and Diversity of Life
Ch. 46 - Changes in the Air To assess the impact of human...Ch. 46 - Prob. 2DAACh. 46 - Prob. 3DAACh. 46 - Prob. 4DAACh. 46 - In most ecosystems, the primary producers use...Ch. 46 - Organisms at the lowest trophic level in a...Ch. 46 - Prob. 3SQCh. 46 - Prob. 4SQCh. 46 - Efficiency of energy transfers in aquatic...Ch. 46 - Prob. 6SQ
Ch. 46 - Earths largest carbon reservoir is _______. a. the...Ch. 46 - Prob. 8SQCh. 46 - Prob. 9SQCh. 46 - The _____ cycle is a sedimentary cycle. a....Ch. 46 - Earths largest phosphorus reservoir is _______. a....Ch. 46 - Prob. 12SQCh. 46 - Nitrogen fixation converts _______ to _______. a....Ch. 46 - Prob. 14SQCh. 46 - Prob. 15SQCh. 46 - Where does your drinking water come from? An...Ch. 46 - Scientists study bubbles trapped in ancient...Ch. 46 - Nitrogen-fixing bacteria live throughout the...
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