The number of different species in the biosphere or in a particular area is called
a. biodiversity
b. ecosystem diversity
c. genetic diversity
d. species diversity

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Which is the most likely reason the writer of the play pygmalion chose to change the character of galatea from a statue to working-class woman?