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28 Apr 2018

You are studying an isolated population of birds that are morphologically distinct from other populations of their species. Female birds of this population will not breed with males from other populations when they are artificially brought into contact. You do detailed DNA analyses and find no differences between your focal population and the rest of the species. Based on this information, which of the following concepts would identify your focal population as a unique species?

A. Biological species concept

B. Morphological species concept

C. Evolutionary species concept

D. Both A and B

E. A, B and C

Follow up Q: Do you think your focal population is a unique species? Why or why not?

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Related questions

1. Imagine you are doing a summer internship as a research assistant at Mountain Lake Biological Station in Virginia. During your internship you observe two distinct species of butterflies in the area. They have similar body shapes and they both drink nectar. But their color patterns are different; one is bright green and one is dark green. You further observe that their habitat ranges overlap, but are distinct in that the dark green butterfly prefers shady, cool forest interiors while the bright green butterfly prefers sunny meadows. Both species are camouflaged well in their respective habitats. You have seen both species preyed upon by birds. Finally, the population size of the two species is about equal. Based on the information given, was the evolution of these two species of butterflies more likely due to natural selection or genetic drift? Write an answer in which you concisely define both mechanisms, state which evolutionary mechanism is more likely and logically explain why.

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QUESTION 5

The vast numbers of finch species on the Galapagos Islands arevery closely related and differ primarily by feedingspecializations. What process best explains this distribution ofspecies?

		sympatric speciation
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10 points

QUESTION 6

Frogs "croak" at night to lure females for mating. Females areattracted only to the song of their species. This is an exampleof

		mechanical isolation
		temporal isolation
		habitat isolation
		behavioral isolation

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QUESTION 7

To prepare for a hiking trip in the Appalachian mountains, youbuy several field guides for the region from a used bookstore. Younotice that the older guides list a single species of tigerswallowtail butterfly, Papilio glaucus, and an Appalachianmorph of this species. However, the newest guide list two separatespecies, P. glaucus and P. appalachiensis. Theauthors of this guide state that the biological species concept wasused in determining their classifications. What do you think ledthem to list two separate species of tiger swallowtail?

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QUESTION 8

A scientist is studying a population of crickets and finds thatthere is variation in the songs used by males to call for mates.Some males call with high pitched, 3 chirp songs and some call withlow pitched, 4 chirp songs. However, offspring from the two typesof males are able to interbreed, so the scientist classifies thepopulation as a single cricket species and goes on to anotherproject. One year later, a mutation arises in a female cricket thatmakes her unable to hear high frequencies. Ten years later, agraduate student returns to the same cricket population anddiscovers that there are now two distinct cricket species in thearea, although they appear morphologically identical. What is themost likely explanation?

		Temporal isolation has led to allopatric speciation
		Sexual selection has led to sympatric speciation
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Describe specifically what you would need to do to decide whether two different individual organisms are members of the same species or not, under the following species concepts:

a.) phenotypic,

Ok, so this one would have to be based on phenotypes correct? say fossil records could show same bone structures like jaws etc. and then birds could be differentiating between beaks, color, and wing size?

b.) "biological"

this one and phylogenetic confuse me. won't you have to look at dna to decide if they're alike? or does biological mean something else?

c.) 'ecological'
This one would just be to check if they can breed with each other right? even though there can be seperation by continents, if they can breed theyre still the same species right?

d.) phylogenetic
this one and biological confusese me. won't you have to look at dna to decide if they're same species or not? or whats the difference from biological and phylogenetic?