{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}


Select 3 the seed weevils exapion ulicis and exapion

Info iconThis preview shows pages 8–10. Sign up to view the full content.

View Full Document Right Arrow Icon
population and a geographically isolated population, more eggs are fertilized by sperm from males from the same population as the female. select 3. The seed weevils Exapion ulicis and Exapion lemovicinum have reproductive periods in the spring and autumn, respectively, in order to coincide with the seasonality of their host gorses (a genus of evergreen shrubs). select 4. In the subgenus Ohomopterus of the ground beetle genus Carabus, the shape and size of the male and female copulatory organs correspond within a species. Genital mismatch in interspecific matings reduces fertility and can cause injury or death to the mating individuals. Mark for Review What's This? Question 4 of 4 4.0 Points Which of the following statements about the mechanism underlying speciation is/are TRUE? Pick ALL that are TRUE: A. In ecological speciation, where 2 subpopulations of the same species exploit different ecological niches and start to evolve independently of each other, reproductive isolation between the 2 subpopulations occurs due to post-zygotic barriers and not prezygotic barriers. B. When 2 species evolve sympatrically, just as we can have selection for prezygotic isolation, we can also have selection for post-zygotic isolation. C. Selection for prezygotic isolation would be predicted to be much stronger for species that evolved sympatrically than for species that evolved allopatrically. D. The experiment where 2 populations of fruitflies raised on different food sources for many generations exhibited reproductive isolation when brought back together suggests that natural selection/adaptation can lead to reproductive isolation. E. None of the above (all these statements are FALSE). Mark for Review What's This? Part 6 of 7 - Speciation of Anoles Lizards Anoles lizards are the most species rich vertebrate genus on the planet, living throughout Central America and the Caribbean islands. Below is a phylogeny of the many different species of Anoles lizards found in the Greater Antilles comprising the 4 islands of Cuba, Hispaniola, Puerto Rico, and Jamaica. Each terminal tip in the tree represents a unique species classified into 6 possible types (Trunk-Ground, Crown-Giant, Twig, Grass-Bush, Trunk, Trunk-Crown), based on morphological/body characteristics and the habitat the species occupies within that island. So for example, the Trunk-Ground species are small brown lizards which live near the ground and the Crown-Giants are big lizards that live in the top of trees. This phylogeny is based on sequence analysis of a homologous gene present in all the species analyzed. Attachments
Background image of page 8

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 9 of 10 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Question 1 of 2 4.0 Points Assuming this molecular phylogeny reflects the true evolutionary relationships among the different lizard species, which of these hypotheses on the evolutionary history of these species is reasonable? Pick ALL that apply: A. An ancestral lizard species residing on the mainland of Central America evolved into six different types of lizards (Twig, Grass-Bush, Trunk-Ground, Trunk, Trunk-Crown, Crown Giant), and these then dispersed from the mainland onto each of the four islands where they further evolved. Some species
Background image of page 9
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}