evolutionary history consists of long periods of equilibrium where there is little change, interrupted by periods of speciation gradualism punctuated equilibrium gradual change occurs steadily in a linear fashion; big changes (such as the evolution of a new species) occur as a result of many small changes gradual change occurs steadily in a linear fashion; big changes (such as the evolution of a new species) occur as a result of many small changes gradualism

evolutionary history consists of long periods of equilibrium where there is little change, interrupted by periods of speciation gradualism punctuated equilibrium gradual change occurs steadily in a linear fashion; big changes (such as the evolution of a new species) occur as a result of many small changes gradual change occurs steadily in a linear fashion; big changes (such as the evolution of a new species) occur as a result of many small changes gradualism

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter20: Speciation And Macroevolution

Section: Chapter Questions

Problem 7TYU: According to the punctuated equilibrium model, (a) populations slowly diverge from one another (b)...

See similar textbooks

Similar questions

Consider two species that diverged whilegeographically separated but resumed contactbefore reproduction isolation was complete. Predictwhat would happen over time if two species matedindiscriminately and a. hybrid offspring survived and reproducedmore poorly than offspring from intraspecificmating or b. hybrid offspring survived and reproduced aswell as offspring from intraspecific mating.Provide an example for each to illustrate yourpoint.
Recent reconstructions of evolutionary history are often dependenton assigning divergence in terms of changes in amino acid ornucleotide sequences. For example, a comparison of cytochromec shows 10 amino acid differences between humans and dogs,24 differences between humans and moths, and 38 differencesbetween humans and yeast. Such data provide no information asto the absolute times of divergence for humans, dogs, moths, andyeast. How might one calibrate the molecular clock to an absolutetime clock? What problems might one encounter in such acalibration?
A) Differentiate allopatric speciation and sympatricspeciation. Which type of speciation is more common andwhy? B) Is allopatric speciation more likely to occur inDumaran Island close to the main island of Palawan oron a more isolated island which is Culion Island of almostthe same size? Explain your prediction.
mbers aferences A population that is in Hardy-Weinberg equilibrium does not experience any migration. How does this relate to evolution? * QOnline When individuals enter a population, adaptive radiation can occur. wsela Speciation only occurs when populations are completely isolated. ation Mogy Periods 1 and 2 When individuals enter or leave a population, the gene frequencies change. ng periods chool MP1, Highschool Highschool MP3, uchool MP4 O Migration interferes with nonrandom mating. Cion ting days Deer mice are usually found in the woods and are dark brown in color. The deer Tue Wed Thu Fri mice that live in the Sand Hills of Nebraska, however, have evolved a lighter coloring, the result of a change in one gene. How does this information illustrate natural selection? * Speciation occurs when groups are geographically isolated. 9:02 US
Indicate the order in which the following steps would take place to result in Allopatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] The two groups develop reproductive isolating mechanisms so that they no longer interbreed. Interbreeding populations connected via gene flow occur across a range. The two separate groups adapt to their new environments. Some sort of physical barrier develops to split the once contiguous population(s) into two separate groups If they come back together, any hybrids formed are less fit.
O Ability to see UV light Grades lembers nferences In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above 30,000. How would the genetic diversity of the northern elephant seal population compare to the genetic diversity of the southern elephant seal population, which was not heavily hunted? * g Online sela on Periods 1 and 2 riods MP1, Highschool The northern elephant seal would have much less genetic varlation than the southern elephent seal. hool MP3, The southern elephant sea would have much less genetic variation than the northern elephant seal. AP4 O The two populations would have similar genetic variation Thu Fri The southern elephant seal would have stable genetic variation because it is in Hardy- Weinberg equilibrium. You are studying two variations of banana slugs. They have similar coloration and ATthnh thare.nhveieallu obl lein thecomeheh US A 9:0
A reasonable definition for a species is: O A distinct kind of animal. O A group of living things with functionally similar traits, for example, all creatures that can fly. O A group of living things with taxonomically similar traits. O A group of taxonomically similar living things in which all healthy members can interbreed and produce fertile offspring. QUESTION 8 If microevolution is any change in the gene pool of a breeding population, then macroevolution is: O A change in the genetic makeup of group that eventually results in the development of a new species. O The mass exctinction of old species to make way for new. O Changes in the physical environment at large. O When microevolution happens on a large scale. * QUESTION 9 What is the primary cause of speciation? O Extinction. O Overpopulation. O Environmental change. O When a breeding population becomes reproductively isolated from its ancestral population, for a long enough time, in a different enough environment, that it…
For which of these groups is the biological species concept not useful for determining species? Mark all that apply. O Separate recognized species that form hybrids (many plant species) Nonsexual groups Extinct groups (fossils) O Species with many remote, isolated populations (vernal pools) O Two sympatric species that do not form hybrids O An introduced species that forms a hydrid with a native species
Macroevolution deals with the evolution of new species that takes place over long periods of time (many generations). True O False
According to the punctuated equilibrium model, (a) populations slowly diverge from one another (b) the evolution of species occurs in spurts interspersed with long periods of stasis (c) evolutionary novelties originate from preadaptations (d) reproductive isolating mechanisms restrict gene flow between species (e) the fossil record, being incomplete, does not accurately reflect evolution as it actually occurred
What does point 2 indicate in the following cladogram? 3FD The point at which species C and D diverged The common ancestor of species A, B, C, and D The point at which species B, C, and D diveraed from species A
South America North America Pacific Panama Caribbean Panama The cladogram above illustrates the relationships between four hypothetical species of oysters found along the coasts of western North America, western South America, and western (Pacific) and eastern (Caribbean) Panama. Use this tree to answer the following question. The two species from Panama are separated from one another by the Isthmus of Panama, the narrow land bridge connecting North and South America, which formed approximately 2.5 million years ago. Given the cladogram and the geographic information, is it likely that the Panamanian species arose through allopatric speciation? O No. While the Isthmus of Panama prevents gene flow between the two Panamanian oyster species, it has been a very long time since this barrier (the isthmus) formed. Yes, because the Caribbean Panamanian species is not related to any other oysters east of the Isthmus of Panama, but it is closely related to the Pacific Panamanian species nonian…