Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 22.1, Problem 3R
Summary Introduction
To review:
The reason, due to which the biological species concept cannot be applied to asexually reproducing organisms. Also, determine whether it limits its applicability or not.
Introduction:
Ernst Mayr defined the biological species concept as the group of actual and potential interbreeding population. This population is reproductively isolated from the other groups of organisms. The word ‘actual’ refers to a situation where the individual lives in the same area and breed with each other. The word ‘potential’ refers to the situation where the organisms do not live in the same area and lead a situation, where they do not interbreed but are capable to breed.
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Life: The Science of Biology
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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
- Which reproductive barrier is most likely to prevent interbreeding between a polyploid species and its diploid sister species? Behavioral isolation: the two species will not recognize each other as mates O Gametic isolation: sperm and egg with different chromosome numbers cannot complete fertilization Hybrid infertility: differences in chromosome numbers will result in infertile hybrids O Mechanical isolation: differences in reproductive structures will prevent interbreeding O Temporal isolation: the two species will not reproduce at the same time of yeararrow_forwardExplain the biological species concept. Why is it not a perfect definition of a species?arrow_forwardHow can we determine if an organism that does not reproduce sexually is a distinct species?arrow_forward
- Name the phenomenon by which rapid speciation takes place?arrow_forwardSympatric speciation by allotetraploidy has been proposed as acommon mechanism for speciation. Let’s suppose you were interestedin the origin of certain grass species in southern California.Experimentally, how would you go about determining if some ofthe grass species are the result of allotetraploidy?arrow_forwardThe biological species concept depends on the existence of barriers to reproduction. What are they? Does this species concept apply in all situations? Think of an example from nature where the biological species concept would NOT be that applicable. Which species concept would be better in this example? How does speciation occur? What environmental factors might contribute to speciation? Can an individual speciate? Use terminology for the two kinds of speciation we have learned about. What is “gene flow”? What does it mean if there is NO gene flow? Two groups of individuals are separated by either side of a canyon. One researcher found that they do not cross the canyon at any point. The group on the north side have fluffy tails and thicker coats, and they do not eat moss. The south side individuals eat moss almost exclusively, have a thin coat and tail, but otherwise are generally identical. When in the lab they mated successfully, and the offspring of that mating also mated…arrow_forward
- What does Speciation and Divergency mean in Biology?arrow_forwardDistinguish between morphological, 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?arrow_forwardHow, then, can speciation occur if gene flow exists?arrow_forward
- which statement is false? 1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span. 2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.arrow_forwardDistinguish between morphological, phylogenetic, and biological species concepts. What are the advantages and disadvantages of each?arrow_forwardCan you answer all the parts to this diagram Species 1 and 2 are sister species from which you’ve cloned related genes. On the gene tree on the top of the next page, use labels to answer the following questions: (a) Label the node that represents a gene duplication with “D,” (b) Label the nodes that represent speciation events with “S,” (c) Pick a pair of genes that are paralogs and label them both “P.” (d) Pick a pair of genes that are orthologs and label them both “O.”arrow_forward
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