When water cannot penetrate a surface, that surface is described as . A. desertified
B. destabilized
C. eroded
D. impervious

Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?

What do nitrifying bacteria convert

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine