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Two populations have evolved into two different species when what has happened?
Wiki User
∙ 7y ago
They diverged enough so that they can't crossbreed.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoUsually they are considered separate species when they can no longer cross breed.
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Why is a tree used to illustrate Darwin's theory of evolution?
Because a tree, or better a bush, shows how evolution actually takes place. The splitting of populations going different directions to species is shown best this way. Where all species at the tip of the branches are equally evolved and connected through the trunk to all other species in the tree.
What has a single species that has evolved into several different forms that live in different ways has undergone?
Adaptive Radiation
What type of speciation occurs when new species arise as a result of geographic isolation?
When a certain species is divided up into two or more separate populations (geographically, for example) they continue to evolve (via natural selection) and over time the two (or more) populations will be so different from each other that they will not be able to reproduce, and will fit the criteria of different species.
What factor caused two populations to become reproductively isolated?
It usually is some sort of physical barrier like an large space between islands.
How does roproductive isolation relate to evolution?
If two sub-populations of a species become reproductively isolated, it means that adaptation or genetic drift can make the two populations diverge genetically. If, as a result of this divergence, upon reintroduction, members of the two sub-populations no longer reproduce successfully, the two sub-populations have become different species.
Two populations have evolved into two species when?
Two populations have evolved into two species when the populations can no longer interbreed.Are you answering a question from the Holt Science & Technology: Life Science textbook? Because these questions are my homework. :P
Describes why the two minnow populations evolved into separate species?
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species. study island
What describes why the two minnow populations evolved into separate species?
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species. study island
Which best describes why the two minnow populations evolved into separate species?
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species.(study island)
How many mammal species exist in the world?
Between 300 and 400 living species, depending on how you count. Scientists don't always agree on whether two different-looking populations should be considered as different species, different sub-species, or just different populations. There are of course likely thousands of extinct species that arose and went extinct over the last 70 million years or so since the first primates evolved.
How are community and populations different?
A population is a group of one type of species. A community is several different populations together.
Darwin saw populations of various species that seemed well-suited to their environment what did this suggest?
it suggested that over time the species had evolved and adapted to the climate they were in.
Why should populations of different species in oceans should be monitored?
populations of different species in the ocean should be monitored so that there is always source of food for the other ocean animals.
What can make two populations so different they become different species?
Millions of years of evolution
What are all or the populations of different species that live and interact in an area called?
a community
All of the populations of different species that live and interact in an area?
Answer Is A Community
How can isolation of a group result in new species?
After many changes evolve in a group of animals, individuals of that group can no longer mate with the rest of the species that remain unchanged. That is the definition of species: individuals that are able to breed among themselves but are not able to breed with other species. When a group of individuals is separated from the rest of their species for a long time, the individuals can evolve different traits. The longer the group is isolated from the rest of the species, the more likely it will evolve into a new species. One example of this has been seen in fish species in the lakes of Switzerland, Great Britain, and Scandinavia. Almost every lake has different forms, believed to have evolved from one species.
