Range

... water buffalo or African buffalo. The aurochs was originally spread throughout Europe, North Africa, and much of Asia. In historical times, their range was restricted to Europe, and the last animals were killed by poachers in Masovia, Poland, in 1627. Breeders have attempted to recreate cattle ...

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... of beak sizes which were smaller. Over many generations, this can potentially shift the population to a size distribution outside the original range! If two populations undergo a different line of evolutionary change long enough, they will no longer be able (or willing) to interbred. Then they ...

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... about the fruit fly experiment, where after a number of generations, two populations were selected for that fell outside the original population's range for bristle hair number. This is a quanitative trait, determined by multiple genes. Another example which is from a natural situation is beak ...

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... (if I recall correctly). It was shown that two populations of Drosophila could be selected to have either more or less bristle hairs than the range of bristle hairs in the original population. In other words, a completelty new trait, not seen in the original population. A new species has completely ...

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hi, could anyone tell me the physiological meaning of the ratio of Chlorophyll a/ Chlorophyll b in green algae? Is there a normal range for this ratio or for the chlorophyll content in green algae? many thanks in advance!

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