Which of the following statements best describes chromosomes?
a. humans have more than 460 chromosomes in every cell of the body.
b. chromosomes are threadlike structures that carry genetic information.
c. humans receive the majority of their chromosomes from their mother.
d. chromosomes are arranged in 20 distinct pairs in the human body.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england