The porphyrin ring of chlorophyll contains the element and the role of the ring is to

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic.