Gregor Mendel's research discovered two genetic laws of heredity by working with which of the following?

Which of the following is the best example of extinction?

A) You change to a different slot machine because the one that you've been playing doesn't pay very often. B) You stop buying lottery tickets until the jackpot is greater than $10 million. C) You stop buying lottery tickets after spending several hundred dollars and never winning. D) You purchase mega bucks tickets instead of regular lottery tickets because the odds of winning are greater.

According to the article It All Adds Up about ethnic differences in school performance, which ethnic group spends the most time doing homework?

(a) Asian American (b) African American (c) Hispanic (d) Caucasian