ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Chapter 43, Problem 4TYU
Summary Introduction
Introduction:
The increasing concentration of toxins or pollutants in the tissues of organisms at the higher levels in the food chain is termed as biological magnification. The accumulation of toxic chemicals can produce more risk to top-level predators than others in the food chain.
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At 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:
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Answer the questions below based on the Active Reading above:
1. Organisms need
to live and
to survive.
2. What do limiting factors do?
a. Separate biotic factors from abiotic factors.
b. Determine which is the predator and which is the prey.
€. Regulate how many organisms live in an ecosystem.
d. Determine which natural disasters will hit an area.
3. Which of the following are abiotic limiting factors?
a. The decomposers in an ecosystem.
b. The populations of producers in a given habitat.
c. Carrying capacities of several species.
d. Water, space, and oxygen.
4. Which of the following is a biotic limiting factor?
a. The amount of breathable oxygen available to a population.
b. Food available for organisms
lw ast
C. The nitrogen to oxygen ratio in the air supply.
d. The number of bodies of water in a habitat.
5. In biology, what is carrying-capacity?
a. The maximum population size an ecosystem can support.
b. A total list of the limiting factors.
C. How much weight an organism can…
Chapter 43 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 43.1 - Prob. 1CCCh. 43.1 - Prob. 2CCCh. 43.1 - WHAT IF? Imagine two populations of a fish...Ch. 43.2 - How does the reduced genetic diversity of small...Ch. 43.2 - Prob. 2CCCh. 43.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 43.3 - Prob. 1CCCh. 43.3 - Prob. 2CCCh. 43.3 - Prob. 3CCCh. 43.4 - How can the addition of excess mineral nutrients...
Ch. 43.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 43.5 - Prob. 1CCCh. 43.5 - Prob. 2CCCh. 43.6 - Prob. 1CCCh. 43.6 - Prob. 2CCCh. 43.6 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 43 - Prob. 1TYUCh. 43 - Prob. 2TYUCh. 43 - Prob. 3TYUCh. 43 - Prob. 4TYUCh. 43 - Prob. 5TYUCh. 43 - Prob. 6TYUCh. 43 - Prob. 8TYUCh. 43 - FOCUS ON EVOLUTION The fossil record indicates...Ch. 43 - Prob. 10TYUCh. 43 - SYNTHESIZE YOUR KNOWLEDGE Big cats, such as the...
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- Biological magnification occurs whena. pollutants increase in concentration in tissues at higher trophic levels.b. the effect of a pollutant is magnified by chemical interactions within organisms.c. an organism is placed under a dissecting scope.d. a pollutant has a greater than expected effect once ingested by an organism.arrow_forwardWhich of the following statements BEST describes energy transfer in an ecosystem? A. If the primary producer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. B. If the primary consumer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. C. If the primary consumer has 175,000 kcal available, the tertiary consumer will receive 175 kcal from the secondary consumer. D. If the primary producer has 175,000 kcal available, the tertiary consumer will receive 17,500 kcal from the secondary consumer.arrow_forwardEach 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 rolearrow_forward
- Which of the following best describes a keystone species? a. An organism, whose introduction causes or is likely to cause environmental harm b. An organism, who if removed, the entire ecosystem changes. c. Can signal a change in the biological condition of a particular ecosystem and diagnose the health of that ecosystem d. Can indirectly protect several other species in the same habitatarrow_forwardNAAQS may change over time because the ability of the population to resist pollutants changes over time a. the ability of polluters to develop new pollution control technologies improves over time C. both (a) and (b) none of the abovearrow_forwardIn the English Channel ecosystem, the number of primary producers is smaller than the number of primary consumers because________. a. the apex consumers have a low turnover rate b. the primary producers have a low turnover rate c. the primary producers have a high turnover rate d. the primary consumers have a high turnover ratearrow_forward
- A species' ______ is all the habitats in which it can live, and all of the resources it is capable of exploiting. A. realized niche B. fundamental nichearrow_forwardHumans' effect on the environment, which includes a combination of what they consume and the waste they produce, is their A. ecological footprint. B. ecological fingerprint. C. sustainability. D. environmental history.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
- EcosystemA hasprimary production of 1000 g C /m2/yr and ecological efficiency of 10%. Ecosystem B has primary production of 300 g C /m2/yr and an ecological efficiency of 25%. a.Which ecosystem will have more production at thesecondary consumer (carnivore) trophic level? b.Which ecosystem is more likely to support an endothermic primary consumer (herbivore)? c.If atrophic level requires at least 1 gC/m2/yr in order to exist, how many trophic levels can each of these ecosystems support?d.Given your answer to part c, which do you thinkhas a larger impact on the energy available at upper trophic levels: primary productivity or efficiency of energy movement across trophic levels?arrow_forwardGross primary productivity refers to the total a. energy used by the heterotrophs of the ecosystem in a given period of time b. energy captured initially by the producers c. quantity of solar energy reaching a given area of the ecosystem d. quantity of solar energy available to the ecosystem in a given period of time e. energy used by the producers for their growth and reproductionarrow_forwardThe Burmese Python, an invasive species, has been introduced to the Florida Everglades, largely through release by owners who acquired the snakes from exotic pet traders. Though the Everglades are protected, pythons as predators can not be easily controlled. What can be concluded about the effect of the python population on the biodiversity of the Everglades? A. Since the Everglades are protected, python control is limited under laws that protect species in the Everglades. B. Since the python population is growing, it will eventually become a native species and will increase biodiversity. C. Since pythons prey on many species in the Everglades, resources will be more available for surviving species and fewer will be considered endangered. D. Since pythons have no predators, they are responsible for decreasing mammal population and are a greater threat to biodiversity.arrow_forward
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