It usually is some sort of physical barrier like an large space between islands.
Speciation caused by the breakup of continents can occur when populations become isolated from one another, leading to genetic divergence over time. Geographic barriers like oceans, mountain ranges, or deserts can prevent interbreeding between populations, ultimately leading to the formation of new species through the process of allopatric speciation.
Temporal isolation between populations is caused by differences in the timing of reproductive activities, such as mating seasons or times of day when individuals are most active. This can prevent individuals from different populations from mating and producing offspring, leading to reproductive isolation.
Genetic drift is the random change in allele frequencies in a population. It is caused by chance events and has more pronounced effects in small populations where genetic diversity is lower. Over time, genetic drift can lead to the loss of certain alleles or fixation of others in a population.
Variations within populations is what natural selection is " looking " for. That one variant of a population is somewhat better able to survive and reproduce than other variants against the backdrop of the immediate environment is natural selection.
It is believed that smallpox, a highly contagious viral disease, caused the death of many American Indians after Europeans arrived in North America. The introduction of smallpox by European settlers led to devastating outbreaks among indigenous populations who had no immunity to the disease.
Speciation caused by the breakup of continents can occur when populations become isolated from one another, leading to genetic divergence over time. Geographic barriers like oceans, mountain ranges, or deserts can prevent interbreeding between populations, ultimately leading to the formation of new species through the process of allopatric speciation.
Robert Koch
the Himalayas and the Gobi Desert.
The geographical setting of Greece.
Geographic isolation is most likely caused by physical barriers such as mountains, rivers, or oceans that prevent populations from interbreeding. These barriers can lead to the evolution of new species due to the lack of gene flow between the isolated populations over time.
Pollution mainly.
Slaves formed families and had children.
only two people survived this
Influenza. It is caused by this new strain of virus that was isolated in Mexico and is now known to be the underlying organism that caused the 2009 pandemic.
Darwin wondered if the finches on the Galapagos Islands were an ancester to the mainland finches. It turns out they were, one finch went to the island and its decsandants spead across the island. Geographic isolation caused the gene pools to become isolated and each population adapted to a particular habitat on the Galapagos Islands. Over time all the populations became genotypically different that they do not interbreed. Mating finches look for the beak shape.
Isolated manufacturing issue' caused wind turbines to break in Illinois.
the thing that caused people to become interested in Alaska was the gold rush.