Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 60, Problem 3TY
The research conducted by Tilman and colleagues demonstrated that
- a. as diversity increases, productivity increases.
- b. as diversity decreases, productivity increases.
- c. areas with higher diversity demonstrate less efficient use of nutrients.
- d. increases in species richness lead to an increase in invasive species.
- e. increased diversity results in increased susceptibility to disease.
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For Eicchornia crassipes (the Water hyacinth) which of the following is most correct:
a.
It has been successfully controlled outside its original natural range by the introduction of natural enemies
b.
It has no known natural enemies
c.
It has never been successfully controlled using natural biocontrol agents
d.
It is naturally controlled by many local enemies outside its original natural range
What are some conditions that might lead to a mutualistic organism becoming a predator/parasite. Select all that apply.
A. Mutualistic nitrogen fixation bacteria might reduce the competitive ability of their host plants in environments with high N availability, because of the energetic costs to the plants of supporting the bacteria
B. none of the above
C. Mutualistic nitrogen fixing bacteria can become parasites in soil with low nitrogen availability because of the energy costs to the plant of supporting the bacteria
D. A mutualist fish species that feeds on ectoparasites of another fish species, might switch to feeding/removing important host tissue or secretions when ectoparasite abundance is too low.
Studies that demonstrate that species living in an ecological community change independently of one another in space and time
a. indicate that the species arrived in the community at different times.
b. indicate that the species’ realized niches are regulated by different aspects of the environment.
c. suggest species interactions are the sole determinant of which species coexist in a community.
d. None of the choices is correct.
Chapter 60 Solutions
Biology
Ch. 60.2 - Is malaria caused by a bacterium, a protist, or an...Ch. 60.2 - Prob. 1CCCh. 60.2 - Prob. 1EQCh. 60.2 - Prob. 2EQCh. 60.2 - Prob. 3EQCh. 60.2 - Prob. 4EQCh. 60.3 - Prob. 1CCCh. 60.3 - Prob. 2CCCh. 60.4 - Prob. 1CCCh. 60.4 - Prob. 2CC
Ch. 60.4 - Prob. 3CCCh. 60.4 - Prob. 1BCCh. 60 - Prob. 1TYCh. 60 - Prob. 2TYCh. 60 - The research conducted by Tilman and colleagues...Ch. 60 - Approximately what percentage of genetic variation...Ch. 60 - Prob. 5TYCh. 60 - Prob. 6TYCh. 60 - Prob. 7TYCh. 60 - Prob. 8TYCh. 60 - Prob. 9TYCh. 60 - Prob. 10TYCh. 60 - Prob. 1CQCh. 60 - Prob. 2CQCh. 60 - Prob. 3CQCh. 60 - Prob. 1COQCh. 60 - Prob. 2COQ
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- Which of the following rows correctly describes the difference between predation and parasitism? Select one: a. Predation Parasitism The host species is killed to benefit the other species. The host species is not killed, but its life is barely sustained to benefit the other species. b. Predation Parasitism The host species is unharmed, and its life is sustained to benefit the other species. The host species killed or barely left alive to benefit the other species. c. Predation Parasitism The host species is not killed, but its life is barely sustained to benefit the other species. The host species is not killed, but its life is barely sustained to benefit the other species. d. Predation Parasitism The host species killed or barely left alive to benefit the other species. The host species is unharmed, and its life is sustained to benefit the other species.arrow_forwardBioprospecting is not always a sustainable approach to natural product discovery because: Select one alternative: A. microorganisms are not always able to be culturable. B. indigenous groups exploit available biological resources. C. compounds may not be produced under tested conditions. D. all known environments have already been 'mined' for natural products. E. Option A and C are both correct.arrow_forwardA conservation biologist has been asked to explain why it is important to protect biodiversity. She would list all of the following reasons except for which one? A. Humans are dependent on many species for food, medicines, fiber, and other necessities. B. Biodiversity can be exploited indefinitely for the profit of humans. C. Other species have inherent value and humans have a moral obligation to protect them. D. Biodiverse ecosystems provide ecosystem services that sustain all life on Earth. E. Biodiversity provides emotional and physical health benefits by providing places for humans to visit for wonder, insight, and exercise.arrow_forward
- A. What is the carrying capacity of this Grey Squirrel population? B. Grey Squirrels are invasice species to the UK, where Red Squirrela are native. What type symbiotic relationship are the two squirrel populations likely in? C. What hqs likely happened to the carrying cwpwcity of the Red Squirrel as the Grey Squirrel population increased in the UK? Explain whyarrow_forwardIn a tropical rainforest, an open gap lacking vegetation has been created by the fall of a large tree. Which of the following statements describes the characteristics of the plant species that are last to colonize this disturbed habitat? a. they have low reproductive rates and are good competitors b. they are good colonizers c. they have high reproductive rates and are poor competitors d. they are dominated by r-selected species e. they have high species diversityarrow_forwardAt any point in time, a number of environmental objectives must be met with a limited amount of economic resources. This means that once an environmental problem is identified, they have to be prioritized. In general, this is done using scientific valuation of the relative risk to human health and the ecology of a given environmental hazard - a procedure known as: A. Biodiversity B. Public Goods C. Risk Assessment D. Profit maximizationarrow_forward
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