Pset2Questions+figures

The divergence of mainland species from the greater

Info iconThis preview shows pages 9–10. Sign up to view the full content.

View Full Document Right Arrow Icon
A. The divergence of mainland species from the Greater Antilles species represents cases of allopatric speciation. B. On each island, there was sympatric speciation to form the island’s species assemblages. C. If you were to use morphological characteristics to make a phylogenetic tree of the relationships between the lizards across all islands, you would end up with an incorrect tree due to homoplasies. D. If you were to use morphological characteristics to make a phylogenetic tree of the relationships between the lizards across all islands, you would end up with the same tree as the one shown above. E. Brown ground lizards and crown giants may be prezygotically isolated since they occupy different habitats. F. Brown ground lizards and crown giants are postzygotically isolated since they are different species that diverged long ago. Mark for Review What's This? Part 7 of 7 - Drift and Bottlenecks Question 1 of 2 4.0 Points
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4/12/13 6:34 PM 2013 Problem Set 2 on Evolution Lectures 4-6 Page 10 of 10 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment You observe three initially identical populations, A, B and C. Populations A and B experience a bottleneck where both populations are reduced to the same low number. Population A is able to return to its original population size within one generation of the bottleneck. Population B’s bottleneck is more prolonged, and takes 10 generations to return to its original population size. Now that populations A and B are back at their original size, which population(s) will have the least potential to adapt to a change in their environment? Why? Pick ONE BEST choice: A. Population B will have the least potential to adapt because it experienced a longer bottleneck. B. Population A and B will both have the least potential to adapt because they both experienced a bottleneck of equal severity. C. Population C will have the least potential to adapt because it did not experience a bottleneck. D. A, B, and C will all have equal potential to adapt because they all have the same number of individuals. Reset Selection Mark for Review What's This? Question 2 of 2 4.0 Points What are the consequences/examples of genetic drift? Pick ALL that apply: A. Genetic drift can both increase or decrease variation, depending on how much selection pressure is being placed on a population. B. Species genotypes change based on how well the resulting attributes allow the species to adapt to its current environment; genetic drift speeds this process along. C. Genetic drift can fix an allele in a population. D. Genetic drift is a strong evolutionary force after a population bottleneck or in a population that was established by a small number of individuals (founder effect). E. Genetic drift can change allele frequencies in a random direction. F. Not all genetic drift in a population is random. Mark for Review What's This? Save Exit Assignment Preview - This is an example student view of this assignment done
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page9 / 10

The divergence of mainland species from the Greater...

This preview shows document pages 9 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online