MasteringBiology With eText - Access
7th Edition
ISBN: 9780321911940
Author: Johnson
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 6TY
Which of the following characterizes mature communities?
a. They contain a limited number of different species.
b. They are generally stable and long-lived.
c. They contain equal numbers of producers and consumers.
d. They can be reestablished quickly following significant environmental change.
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Each species has a particular niche within a community. This niche is defined by which two sets of factors?
a.
Net primary productivity and physical environment
b.
Functional role and net primary productivity
c.
Net primary productivity and biological environment
d.
Physical environment and functional role
Which of the following is a component of an ecosystem but not of an ecological community? (a) a producer (b) water (c) a secondary consumer (d) a primary consumer
The graph above is from a paper by Dave Tilman published in 1994. Which of the following statements is consistent with the graph?
A) The results contradicts the intermediate disturbance hypothesis
B) Increasing diversity increases community stability
C) The results support the intermediate disturbance hypothesis.
Chapter 23 Solutions
MasteringBiology With eText - Access
Ch. 23 - Prob. 1QCCh. 23 - Prob. 2QCCh. 23 - What are the components of an ecosystem?Ch. 23 - Prob. 2CRCh. 23 - Describe what happens to a country as it undergoes...Ch. 23 - Define zero population growth and explain why it...Ch. 23 - Prob. 5CRCh. 23 - Prob. 6CRCh. 23 - Prob. 7CRCh. 23 - Explain why the water cycle is essential to all...
Ch. 23 - Discuss the importance of the carbon cycle.Ch. 23 - Discuss the phosphorus cycle and its importance.Ch. 23 -
1. Your college campus, including all the humans...Ch. 23 -
2. Which of the following will affect the biotic...Ch. 23 - A population is growing at a rate of 2% per year....Ch. 23 - Which of the following statements is false? a. The...Ch. 23 - The large intestine of humans is populated by a...Ch. 23 -
5. Which of the following characterizes mature...Ch. 23 - Which statement about the human fertility rate is...Ch. 23 -
6. _____ flow(s) one-way through ecosystems while...Ch. 23 - All of the following terms can appropriately...Ch. 23 -
8. A human maintaining a vegan diet (containing...Ch. 23 - All of the following processes are involved in the...Ch. 23 - Prob. 12TYCh. 23 - Prob. 13TYCh. 23 -
12. Which biogeochemical cycle does not include...Ch. 23 - Prob. 15TYCh. 23 - Given absolutely no environmental resistance, how...Ch. 23 - Prob. 2AWKCh. 23 - Prob. 4AWKCh. 23 - Prob. 5AWKCh. 23 - Prob. 6AWKCh. 23 - Prob. 7AWKCh. 23 - Least developed countries tend to be poorer than...
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- A community that does not undergo further succession is an apex community. True or false?arrow_forwardPhytoplankton absorb a very small concentration of a pollutant and are then eaten by zooplankton. Smelt eat the zooplankton and then Lake trout eat the smelt. At the top of the food chain, the concentration of the toxic chemical can be so high that it is dangerously toxic to the herring gull or the herring gull's offspring. This is an example of _____. a biomagnification b bioaccumulation c air pollution d habitat lossarrow_forwardIf a community within an ecosystem is stable does that mean the entire ecosystem can be considered stable as well?arrow_forward
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- In Alaska Orcas (Killer Whales) have recently started eating sea otters in large numbers. Populations of sea urchins (food of sea otters) have increased. Sea otters eat algae. The kelp forests have started to disappear. This is an example of which of the following. Group of answer choices a. random changes in a community b. a limiting nutrient c. bottom up control of a community d.top down control of a communityarrow_forwardChoose a biological resource and address the following four questions using examples with that biological resource. a) Biomass production over time b) Carrying capacity and extinction threshold c) Management of the recruitment rate d) Describe two ways that climate change could impact the biological resource you selected for this question RESOURCE ECONOMICSarrow_forwardWhich of the following would be most effective in slowing the loss of biodiversity?arrow_forward
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