Which of the following scenarios would most liekly lead to resource partioning and consequently contribute to ecosystem stability?

a. sympatric populations of the same animal species

b allopatric populations with organisms that share the same niches

c. sympatric population with organisms that share same niches

d. allopatric population of same species

answer

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Nelly StrackeLv2

17 May 2018

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Related questions

A plant species is distributed on the slopes of two mountains and in the broad valley between them. During a period of climate warming, the valley floor becomes uninhabitable to the plant, but the populations persist on the mountains and undergo speciation (Phase 1). The climate cools again and the new species come into contact (Phase 2), but the only reproductive barrier between them is hybrid inviability, a postzygotic barrier.

a) What type of speciation is occurring during Phase 1 (allopatric, parapatric or sympatric)? Explain your answer.

b) During Phase 2, would plants pollinated by members of the same species be fitter or less fit than those pollinated by the other species? Explain your answer.

c) What types of traits are likely to be favoured in this situation?

lavendermallard50

QUESTION 1

A dam dividing a fish population will likely lead to sympatricspeciation.

True

False

10 points

QUESTION 2

As certain lineages of animals evolved more and more complexbody plans, what has happened to the Hox genes of theseanimals?

		The number of Hox genes has been reduced
		The more complex the body plan, the greater the number of Hoxgenes.
		Complex body plans have more inactive Hox genes
		There is no correlation between body plan complexity and Hoxgenes

10 points

QUESTION 3

Which of the following would lead to allopatric speciation?

		the colonization of an island by a subset of the mainlandpopulation
		a new river channel dividing beetles into two separatepopulations
		the extinction of a large proportion of a population, leavingonly distant sub-populations
		all of the above

10 points

QUESTION 4

The hybrid sterility of a hinny (cross between a female horseand a male donkey) is an example of

		prezygotic isolation
		allopatric speciation
		sympatric speciation
		postzygotic isolation

16. Which of the following is not an example of allopatric speciation?

A) The Isthmus of Panama arose 10 million years ago dividing a species of snapping shrimp into two separate populations. Over time, individuals on one side of the isthmus became reproductively isolated from individuals on the other side.

B) A species of hummingbird lives on mainland Costa Rica. Ten individuals make their way to a small island off the coast. Over time these island birds become reproductively isolated from the mainland birds.

C) A squirrel population was divided into two groups because of the formation of the Grand Canyon. Since that time, genetic changes have occurred and the two groups of squirrels are now reproductively isolated from one another.

D) Two populations of deer are separated by a river. Over millions of years, the river dries up. When the two deer populations meet, they are able to interbreed successfully.

E) All of these are examples of allopatric speciation.

Why is D considered allopatric speciation? I thought that D is the correct answer because if the two deer populations are able to interbreed, then speciation did not occur; so it cannot be considered allopatric speciation. â