4. Point-source pollution comes from a known source. Which amount is point-source pollution?
a. the difference between E and F
b. the difference between F and G
c. the difference between G and H
d. the difference between H and I

In cellular biology, what is the definition of the word specialized? te o a. carried across the cell membrane by a specific protein a o b. a structure within a eukaryotic cell that performs a specific function o c. adapted to a specific function or condition es essere beste ser bendere s b tele ee o d. containing unique dna ser eeseen les, e nde este ses see ste submit e