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What is the difference between allopatric and sympatric speciation?
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What species concept should be used in the apple maggot fly case?
In the case of the apple maggot flies, it is an example of sympatric speciation. Two different populations occur in different niches where there is no gene flow between the two.
What is the differences between members of the same species called?
It varies based on the organism: breed, race, strain, member are all used.
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
A population of animals is split in half by a river. Before speciation is completed the two halves are rejoined when a drought causes the river to run dry how would this impact the two populations?
the gene flow would increase (apex)orGene flow would increase between the two halves, and speciation would not occur.
What is the difference between a male and female anus?
There is no difference.
Speciation without geographic isolation is called what?
Sympatric Speciation develops within the range of the parent population. This type of speciation does not include geographical isolation, and can occur rapidly if a genetic change results in a barrier between the mutants and the parent population.
What are 3 events that can lead up to speciation?
Isolation often leads to speciation, because as each isolated population evolves new characteristics, the separate populations eventually get DNA that is too different for the two to breed and have fertile offspring (this is the point when speciation has occurred). In the case that there is not isolation, the whole species must slowly evolve until it becomes a new species. However, here the line between where the speciation actually occurred becomes blurry, because it doesn't happen in a single generation.
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 type of speciation occurs when a plant population becomes reproductively isolated while living with its parent population?
Sympatric speciation occurs when a plant population becomes reproductively isolated while living with its parent population. This occurs without physical separation, often driven by ecological or behavioral factors that prevent interbreeding between the populations.
What is the relationship between speciation and the theory of punctuated equilibrium?
No difference.
What species concept should be used in the apple maggot fly case?
In the case of the apple maggot flies, it is an example of sympatric speciation. Two different populations occur in different niches where there is no gene flow between the two.
What is the difference between divergence and speciation?
Divergent speciation refers to the rise of a new species when organisms that can interbreed and reproduce fertile offspring get separated. Separation can be due to geographical barriers like mountains and lakes.
Resource partitioning would be most likely to occur between?
sympatric populations of species with similar ecological niches
What is is micro evolution?
Micro-evolution is technically defined as evolution within a species, anything up to speciation without actual speciation. Macro-evolution is all evolution starting with speciation. It is important to note that these terms do not refer to different processes: they describe the same process, evolution. The only difference is an arbitrary line drawn by humans, like the line drawn between a walk around the block and a cross-county hike: they both refer to the process of walking; the only real difference is distance.
Why does geographic isolation cause speciation (Apex)?
it prevents gene flow between populations
What is the main factor that leads to speciation between two populations?
Lack of exchange of genetic information.
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.
