Ellen is 5 1/2 feet tall. her sister is 3/4 foot shorter than ellen. how tall is ellens sister? write your answer as a improper fraction and as a mixed number

what is the original number? you forgot to add it.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.