BSC 314 Lecture Notes - Lecture 46: Canine Distemper, Motility, Viroid

Until light microscopes with better lenses and electron microscopes with higher

magnifying capabilities were developed, microbiologists knew little about the structure

and considerably more about the chemistry of the organisms they studied. A typical

bacterial cell is illustrated in Figure with the major features named. The cell is most of

the features found in eukaryote cells.

When growth conditions become unfavorable—when nutrients become scarce, for

example, or the environment dries—many bacteria produce endospores adding thick

walls around the circular DNA together with a bit of cytoplasm. The spores resist high