BIOLOGY:CONCEPTS+INVEST.-CONNECT ACCESS
5th Edition
ISBN: 9781260542233
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 38, Problem 2MCQ
Cyanobacteria are photosynthetic bacteria that live in water. Two species, isolated from the same habitat, use different wavelengths of light in photosynthesis. This is an example of
a. competitive exclusion.
c.
b. commensalism.
d. biomagnification.
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Chapter 38 Solutions
BIOLOGY:CONCEPTS+INVEST.-CONNECT ACCESS
Ch. 38.1 - Distinguish among communities, ecosystems, and...Ch. 38.1 - Prob. 2MCCh. 38.1 - Distinguish between habitat and niche.Ch. 38.1 - Prob. 4MCCh. 38.1 - Prob. 5MCCh. 38.1 - Prob. 6MCCh. 38.1 - Prob. 7MCCh. 38.2 - Prob. 1MCCh. 38.2 - Prob. 2MCCh. 38.2 - Prob. 3MC
Ch. 38.2 - Prob. 4MCCh. 38.3 - Identify the trophic levels of a food chain.Ch. 38.3 - Prob. 2MCCh. 38.3 - Prob. 3MCCh. 38.3 - Prob. 4MCCh. 38.3 - Prob. 5MCCh. 38.3 - Prob. 6MCCh. 38.4 - Prob. 1MCCh. 38.4 - Prob. 2MCCh. 38.4 - Prob. 3MCCh. 38.4 - Prob. 4MCCh. 38.4 - Prob. 5MCCh. 38.5 - Prob. 1MCCh. 38.5 - Prob. 2MCCh. 38 - Prob. 1MCQCh. 38 - Cyanobacteria are photosynthetic bacteria that...Ch. 38 - Prob. 3MCQCh. 38 - Prob. 4MCQCh. 38 - A large tree falls over in an old-growth forest,...Ch. 38 - Prob. 6MCQCh. 38 - In a prairie, which trophic level should have the...Ch. 38 - Prob. 8MCQCh. 38 - Prob. 9MCQCh. 38 - Prob. 1WIOCh. 38 - Prob. 2WIOCh. 38 - Prob. 3WIOCh. 38 - Prob. 4WIOCh. 38 - Prob. 5WIOCh. 38 - Prob. 6WIOCh. 38 - Prob. 7WIOCh. 38 - Prob. 8WIOCh. 38 - Prob. 9WIOCh. 38 - 1. Review the definitions of ecology, populations,...Ch. 38 - Prob. 2PIT
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- Which of the following events is NOT a common among microbes in the air? A. Exposure to UV light. B. Relocated due to updrafts. C. Cellular death due to desiccation. D. Decrease is population due to competition.arrow_forwardNitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false? A. By cyanobacteria B. By electrical discharges in the atmosphere C. By industrially synthesised fertilizer D. By denitrificationarrow_forwardThe large intestine of humans is populated by a complex community of benign microorganisms (not harmful) which compete for nutrients and may prevent pathogenic (harmful) microorganisms from becoming established. Which term would best describe this?a. competitive exclusionb. selective pressurec. successiond. environmental resistancearrow_forward
- The cyanobacteria in Lake Erie would best be described as .a. decomposersb. tertiary consumersc. primary producersd. heterotrophse. secondary consumersarrow_forwardWhat is one of the primary benefits of bioremediation? Group of answer choices A. to improve human health with the help of living organisms such as bacteria B. to clean up areas polluted with toxic compounds by using bacteria C. to improve soil quality for plant growth by using bacteria D. to improve bacteria for production of useful chemicalsarrow_forwardAutotrophs are unable to make their own food so they depend on other organisms for their source of food. Heterotrophs are producers. a. Both statements are true b. The first statement is true c. Both statements are false. d. The second statement is true.arrow_forward
- Which of the following is not true about microbial communities? A. They help herbivorous mammals to derive nutrition from otherwise indigestible cellulose. B. They consume some of the digesting food for their own nutrition. C. They help with vitamin production in the human digestive tract. D. They are present only in herbivores. E. None of the above answer choices are correct. (That is, answer choices A, B, C and D are all true statements.)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_forwardWhich of the following statements DOES NOT describe nitrogen fixing bacteria? A. Can be found only as a symbiotes associated with the root nodules of legumes. B. Maybe be present in soil. C. Converts atmospheric nitrogen to organic nitrogen. D. Composed of many species of bacteria.arrow_forward
- 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.arrow_forwardUse the graphs to answer the question below. In each of the figures, the x-axis represents time, and the y-axis represe of Species 2. is A. В. C. D. Which one of the graphs above illustrates competitive exclusion? O Graph A O Graph B Graph C O Graph Darrow_forwardWhich of the following is a process of the nitrogen cycle that involves the conversion of nitrogen gas to ammonia? a.Nitrogen fixation b.Nitrification c.Ammonification d.Denitrificationarrow_forward
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