Answer:
Cyclones are actually water born storms in the equatorial regions.
Mainly, water near this equator get heated up as it receives direct sunlight, the hot air rises up and to fill this empty space cold air from poles rush to these equatorial regions. And hence the cyclones are mostly formed in Equatorial regions.
<u>Radiometric</u> dating uses a radioactive substance to determine the <u>absolute </u>age of something.
I believe it is behavioural isolation. When there are changes within a certain species, e.g. new birdcalls are formed in certain individuals in a species, "traditional" birds may not like such mating calls and only choose to mate with the more common birdcalls from majority of the birds. There are also some birds that may like the new birdcalls, and choose to mate with birds with those birdcalls. They become genetically isolated as they continue such behavior. Eventually, through genetic drift and other mutations, different species form from a single specie.
Hope this helps! :)
