A, B, and C are three different island species and all share a common ancestor. Their ranges are shown in the diagram below. Note that A and B are on a separate island from species C. Species A and B are isolated from one another by a river. There are two populations of species C (C1 and C2) that are isolated from one another by a mountain range. C2 A Mountain В River Is the following statement consistent with the data presented in the diagram, above? Choose True for yes, the statement is consistent with the diagram. Choose False for no, the statement is not consistent with the diagram.

A, B, and C are three different island species and all share a common ancestor. Their ranges are shown in the diagram below. Note that A and B are on a separate island from species C. Species A and B are isolated from one another by a river. There are two populations of species C (C1 and C2) that are isolated from one another by a mountain range. C2 A Mountain В River Is the following statement consistent with the data presented in the diagram, above? Choose True for yes, the statement is consistent with the diagram. Choose False for no, the statement is not consistent with the diagram.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter11: Evidence Of Evolution

Section: Chapter Questions

Problem 3FIO

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Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution? a. The two species share many proteins in common, and the nucleotide sequences that code for these proteins are almost identicalb. The two species live at great distance from each otherc. The structures in adult members of both species are similar in sized. Both species are well adapted to their respective environments
DNA-sequencing studies for a gene in two closely relatedspecies produce the following numbers of sites that vary:Synonymous polymorphisms 50Nonsynonymous polymorphisms 20Synonymous species differences 18Nonsynonymous species differences 2Does this result support neutral evolution of the gene?Does it support an adaptive replacement of aminoacids? What explanation would you offer for theobservations?
Imagine that you have the DNA sequences from the intron of a gene in three species called A, B, and C. Species A and B are most closely related, while C is more distantly related. The sequences of A and B differ by 18 base pairs, A and C differ by 26 base pairs, and B and C differ by 28 base pairs. Fossils show that species A and B diverged about 1.2 Mya, but there is no fossil evidence as to when the most recent common ancestor of all three species lived. (Draw a simple tree to help you think about the problem) Use the genetic data to estimate that date (most recent common ancestor). HINT = use Eqn 7.1, several times- first to estimate mutation rate. Then to estimate the unknown time since divergence
Imagine that you have the DNA sequences from the intron of a gene in three species called A, B, and C. Species A and B are most closely related, while C is more distantly related. The sequences of A and B differ by 18 base pairs, A and C differ by 26 base pairs, and B and C differ by 28 base pairs. Fossils show that species A and B diverged about 1.2 Mya, but there is no fossil evidence as to when the most recent common ancestor of all three species lived. (Draw a simple tree to help you think about the problem) Use the genetic data to estimate that date (most recent common ancestor). What assumptions are you making to get this estimate?
Suppose species 1, 2, and 3 are endemic to a group of islands (such as the Galápagos) and are all descended from species 4, an outgroup. We sequence a gene and find ten nucleotide sites that differ among the four species (among many other loci that do not vary). The nucleotide bases at these sites are Species 1: GCTGATGAGT Species 2: ATCAATGAGT Species 3: GTTGCAACGT Species 4: GTCAATGACA Estimate the phylogeny of these taxa by plotting the changes on each of the three possible trees and determine which tree requires the fewest evolutionary changes. (Please answer including what are 3 possible trees.? )
(top or bottom) Species A, B, C, D, and, E are all extant species (living today; not to be confused with “extinct” species). Consider the common ancestor shared between humans and species A (ancestor A-H), the common ancestor between species B and humans (ancestor B-H), etc. Which of thetwo trees below best represents the phylogenetic relationship between species shown in the nucleotide divergence plot above (top tree or bottom tree)?
About 3 million years ago, the Isthmus of Panama (a narrow strip of land connecting North and South America) formed, dividing marine organisms into Pacific and Caribbean populations. Researchers have examined species of snapping shrimp on both sides of the isthmus. Based on the morphological species concept, there appeared to be seven pairs of species, with one species of each pair in the Pacific and the other in the Caribbean. The different species pairs live at somewhat different depths in the ocean. Using mitochondrial DNA sequences, the researchers estimated phylogenies and found that each of these species pairs, separated by the isthmus were indeed each other's closest relatives. The researchers investigated mating in the lab and found that many species pairs were not very interested in courting with each other, and any that did mate almost never produced fertile offspring. Use the species concepts to explain how the sister populations on opposite sides of the isthmus are true…
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.
You have purified cytochrome C from a newly discovered species of bacteria called VCU. When you obtain the amino acid sequence you compare it to the cytochrome C amino acid sequence from other bacterial species. Species A- 16 amino acid differences with VCU Species B- 3 amino scid differences with VCU Species C- 6 amino acid differences with VCU Species D- 18 amino acid differences with VCU List the bacterial species (A-D) from closest related to VCU to most distantly related to VCU
Among the ingroup species A-D, species A shares the largest number of derived traits with species C. What term best describes species C relative to species A? options: ancestor homologous species outgroup sister species
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Three species have the following DNA sequences at a particular region of a gene: Species A: ACGT Species B: ACGT Species C: AGGT An outgroup is AGGT. a. Which two species are most likely to be sister species? b. How do you know?