EBK BIOLOGY
11th Edition
ISBN: 8220102797352
Author: Raven
Publisher: YUZU
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Chapter 22, Problem 2S
If there is no universally accepted definition of a species, what good is the term? Will the idea of and need for a “species concept” be eliminated in the future?
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The biological species concept defines a species by its morphology. In other words all members of the same species look alike? True or false?
If the phylogenetic species concept (PSC) were used to define species, rather than the biological species concept (BSC), how might that change the estimates of species diversity (numbers of species) on a worldwide basis?
True or False: Estimates of species diversity are likely to change if the PSC is used. In particular, one would expect the number of species to increase. This is because individuals from divergent allopatric populations that can potentially interbreed would belong to the same species under the BSC. These same organisms would be classified as members of different species under the PSC.
How does the biological species concept differ from earlier typological concepts of a species? Why do evolutionary biologists prefer it to typological species concepts?
Chapter 22 Solutions
EBK BIOLOGY
Ch. 22 - Prezygotic isolating mechanisms include all of the...Ch. 22 - Reproductive isolation is a. a result of...Ch. 22 - Problems with the biological species concept...Ch. 22 - Prob. 4UCh. 22 - Prob. 5UCh. 22 - Prezygotic isolation a. always involves mechanisms...Ch. 22 - Speciation by allopolyploidy a. takes a long time....Ch. 22 - Adaptive radiation a. is the result of enriched...Ch. 22 - Prob. 9UCh. 22 - Character displacement a. arises through...
Ch. 22 - Prob. 11UCh. 22 - If reinforcement is weak and hybrids are not...Ch. 22 - Natural selection can a. enhance the probability...Ch. 22 - Hybridization between incompletely isolated...Ch. 22 - Natural selection can lead to speciation a. by...Ch. 22 - Natural selection can lead to the evolution of...Ch. 22 - If there is no universally accepted definition of...Ch. 22 - Refer to figure 22 6 In Texas. Drummond s phlox is...Ch. 22 - Refer to figure 22.16. Geospiza fuliginosa and...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Should one line of evidence hold more weight than another when we discuss the classification of species? Or should all lines of evidence be weighed equally?arrow_forwardExplain the biological species concept. Why is it not a perfect definition of a species?arrow_forwardTwo biologists are arguing at a conference. One says that the Biological Species Concept (BSC) is superior. Her colleague argues that a different species concept is needed. Which of the following claims of the biologist are true and which are false? 1. The BSC potentially would work for all multicellular organisms. 2. A Morphological Species Concept would work better for cryptic species than the BSC. 3. If two populations of snails are separated by a huge distance, they cannot mate. This means the BSC cannot apply to them.arrow_forward
- What notion is common to the morphologicall species concept, the biological species concept and the phylogenetic species concept?arrow_forwardWhy haven’t we been able to come up with a single, comprehensive, and agreed-upon species concept?arrow_forwardThe biological species concept is based on the assumption that species are reproductively isolated and do not share genes. And yet a number of organisms that are considered different species hybridize (mate and exchange genes). Hybridization between different species is more common in plants than in animals. Propose some possible reasons for this difference.arrow_forward
- What criteria are used in the biological species concept to define a species? Choose all that apply.- live in same habitat - have same niche - produce viable offspring - have similar genetics - look similar - produce fertile offspring - have similar ancestryarrow_forward10) If you determine that 2 similar organisms distinctly different ways of interacting with other species and their environment, and you therefore classify each as a different species, which species concept are you using? A) The biological species concept B) The phylogenetic species concept C) The ecological species concept D) The morphological species conceptarrow_forwardSpecies Concepts Review The Baltimore Orioles and Black-backed Orioles species complex has conflicting evidence in support of each being their own species and in support of them being the same species. Review the evidence below for each hypothesis, then, using that evidence, explain whether they should be classified as distinct or the same species based on each species concept. Then, using the overall evidence, decide whether to classify them as the same or different species. Genetic Information (In the Species Concepts lab, we used a "controversial" 10% cutoff. A more realistic cutoff might be 1%. Let's use a 1% cutoff for this activity.) Sequence Differences Baltimore Oriole vs Black- backed Oriole Cytochrome b 0.26% Control region 0.74% 2A. Based on the genetic information above, should the Baltimore Oriole and Black-backed Oriole be classified as one species or two species?arrow_forward
- Distinguish between morphological, phylogenetic, and biological species concepts. What are the advantages and disadvantage of each? What notion is common to each of the species defintions that we considered? Why do species definitions matter in conservation biology?arrow_forwardDistinguish between morphological, phylogenetic and biological species concepts. What are the advantages of each?. What notion is common to each of the species definition that we considered?. Why do species definition matter in conservation biology?arrow_forwardDistinguish between morphology,phylogenetic and biological species concepts.what are the advantages and disadvantages of each?what notion is common to each of the species definitions that we considered?why do species definitions matter in conservation biologyarrow_forward
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