15. the upper respiratory system includes the
a. bronchi.
b. bronchioles.
c. lungs.
d. pharynx.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.