An environmental factor that prevents an organism or population from reaching its full potential of size or activity?

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

How do you transfer mrna into codons ? i'm so confused : (

Which enzymes break down carbohydrates?