What is the main function of the cell wall?
a. store carbohydrates for later use
b. provide rigid structure for cell
c. package proteins for export
d. carry out photosynthesis

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above