Whats the difference between jet streams and global wind belts

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which of the following is a testable hypotheses?