What characteristics were used to classify organisms before woese's tree of life analysis?

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

The cluster of developing cells from conception until birth is called an