Which term refers to the variety of observable and unobservable similarities and differences among people?

Diversity

Step-by-step explanation:

Diversity is a biological term which helps to show the different changes or variations both those observed or those not observed that exists within a sample or a population. Diversity can occur as a result of Genetic different in the genetic makeup of the individuals involved.

Their are no exactly the same kind of persons in the world as one or more forms of difference must exist either in PHENOTYPE OR GENOTYPE OF PEOPLE.

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons