Consider the sets A={1,3,5,7} and B={11,13,15,21}. Which set represents a universal set?

negative integers
prime numbers
even integers
odd integers

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.  

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled