What does para-focal mean?

What are the three major branches of Domains?

Describe Archean organisms.

How are Archaea difference from bacteria?

What are extreme halophiles?

What are extreme thermophiles?

What are Methanogens?

What is it difficult to classify archaea?

How archaea different from traditional species?

how do you calibrate a microscope?

how do you calculate um from slide and lense units?