I think 1 and 3 but don’t count me
un organismo que deriva sus requerimientos nutricionales de sustancias orgánicas complejas.
Probably not. some bacteria produce enzymes that break down hemoglobins in RBC.
This is true. Urea carries the bloodstream to your kidneys which then transport waste along with water to form urine.
Arthropods has the bilateral symmetry !
so answer is B !