Variation is the differences between individuals of the same species, caused by genetic and environmental factors. Surveys into variation give data that are continuous, which means to come in a range, ...

A characteristic of any species with only a limited number of possible values shows discontinuous variation. Here are some examples: For any species a characteristic that changes gradually over a ...

I HAVE just received a copy of Mr. Bateson's most valuable work on the “Study of Variation”; and although it will take many weeks to read it as it deserves to be read, a few remarks are now ventured ...