Why is nitrogen important (simple answer please)

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

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Which of the following best describes the relationship between glucose and complex molecules such as hormones?