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Speciation that begins as members of a population occupy different ecological zones within the same geographical area is?
Wiki User
∙ 9y ago
Sympatric speciation refers to the formation of two or more descendant species from a single ancestral species all occupying the same geographic location. Often cited examples of sympatric speciation are found in insects that become dependent on different host plants in the same area.
Wiki User
∙ 9y ago
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How is sympatric speciation similar to allopatric speciations?
allopatric speciation happens when a physical barrier divides two populations of the same species and sympatric speciation happen when no physical barrier divides the member of a population, but methods such as polyploidy (chromosome doubling) do not let the members of the species have fertile offspring, 2 species are formed (the parental "normal" species and the divergent species "polyploids"). Remember that a species is defined as a population that when mated with one another produce fertile offspring. A polyploid and a parental organisms can not produce fertile offspring together so they become two different species and speciation is said to have occurred.
What is the role of gene flow in speciation?
None. Gene flow between two groups of the same population tends to stabilize alleles, or one way gene flow tends to not change allele frequency enough for speciation. The only speciation driver we know of is natural selection working on two allopatic species separately. Different populations, due to this geographic separation, can speciated, but gene flow between them, whatever the direction, will tend to bring things to a stability, or to a situation that is not enough for speciation.
What has a single species that has evolved into several different forms that live in different ways has undergone?
Adaptive Radiation
What types of evolution are there?
Basically, there's only one type: the shifting in allele frequencies in populations over the generations, driven by reproductive variation, differential reproductive success, and various molecular mechanisms in genetics. There are however numerous distinct phenomena associated with this mechanism, and different patterns to the way it affects populations, depending on circumstances. If one looks at the different 'modes' of speciation, for instance, even though they all follow from the same basic mechanisms, there are allopatric speciation, peripatric speciation, parapatric speciation, and sympatric speciation, each achieving the same thing through the same mechanisms but via slightly different paths.
How does the existence of an archipelago promote speciation?
An archipelago is basically a group of islands. Speciation according to the Biological Species Concept by Ernest Mayr, is -- populations whose members can interbreed and produce viable, fertile offspring. For example, the Galapagos finches studied by Charles Darwin. Some live on different parts of the archipelago and so have different features, adapting to their environment. These different feature obviously get passed down and are more frequent in future populations because those finches with this specific adaptation lived and reproduced better. So since there are different islands, there are different finch speciation and so the geographic isolation promotes speciation.
What is an ecological race?
An ecological race is a population of a species that differs genetically because of adaptation to different living conditions.
What situations will speciation occur?
Speciation is the process of a new species developing. Speciation can occur from a geographical split in the species, Species can split in the same area if they start depending on different foods.
Speciation is the process by which new species are formed Which of the following circumstances is most likely to lead to speciation?
A population becomes separated by different environments and do not reproduce with one another.
What would most likely increase the rate of speciation in a population?
put the two groups in different enivorment apex
What usually has to happen before a population can become 2 different species?
Allopatric Speciation usually must happen
What would most likely increase the rate of speciation in the population?
put the two groups in different enivorment apex
How is sympatric speciation similar to allopatric speciations?
allopatric speciation happens when a physical barrier divides two populations of the same species and sympatric speciation happen when no physical barrier divides the member of a population, but methods such as polyploidy (chromosome doubling) do not let the members of the species have fertile offspring, 2 species are formed (the parental "normal" species and the divergent species "polyploids"). Remember that a species is defined as a population that when mated with one another produce fertile offspring. A polyploid and a parental organisms can not produce fertile offspring together so they become two different species and speciation is said to have occurred.
Which circumstances is most likely to lead to speciation?
A population becomes separated by different environments and do not reproduce with one another. - Copied right from study island
What is it called when species are different from their ancestors?
Speciation.
Darwin's finches speciation how did the population separate?
The distance between the islands meant that the Fincehes on different Islands could not interbreed wich led to some extinction
What are ecological equivalents?
If there are 2 species that have evolved from one specie, the they very well can occupy the same ecological niche, and since evolution take a long time, there is a possibility of a large distance gap between these two specie, thus creating ecological equivalence! If this still doesn't make sense look up the term "ecological equivalent" in the dictionary!
Do a population mean one group or species or different varities?
A population is the summation of a species (members capable of producing fertile offspring) within a geographical area.
