Ametalworker has a metal alloy that is 15% copper and another alloy that is 75% copper. how many kilograms of each alloy should the metalworker combine to create 100 kg of a 63% copper alloy?

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.