These allow big or charged particles across the membrane. a) Nucleic Acids
b) Lipids
c) Proteins
d) Carbohydrates

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

What do nitrifying bacteria convert