Where does actual oxygen exchange take place in the human respiratory system? a. bronchi b. trachea c. diaphragm d. alveoli

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.