Why do you think humans have two sets of 23 chromosomes? (hint: where did each set come

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

compost can be added to topsoil as a:

pesticide