Which of the following are considered macromolecules? select all that apply.
a) nitrogen
b) lipids
c) proteins
d) caron

Which blood cell spend most of their time in the lymphatic system?

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

Which type of landforms forms at the plate boundary as a result of divergent stress