The structure of dna resembles a twisted ladder. which structural components form the rings of the ladder?
a) deoxyribose sugars
b) phosphate groups
c) nitrogenous base pairs
d) ribosomes

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

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 group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae