DiversityofLife - 3/1/11 Chapter 20 Diversity of Life...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
3/1/11 1 Chapter 20 Diversity of Life Bacteria (Domain) Most do not cause disease Harmless varieties live on and in us; skin, digestive tract Millions of unstudied species live in soil or water and do not interact with humans at all Bacterial Roles in Nature Oxygen production Photosynthetic bacteria join plants and algae to make O 2 that we breathe Nitrogen fixation Brings an essential nutrient (N 2 ) from air into soil; helps plants Decomposers Without them, organic material would pile up instead of recycling Bacteria are very small Bacterial Characteristics •Prokaryotic •Single-celled •Asexual reproduction •Cell wall made of peptidoglycan •Different species are metabolically diverse
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3/1/11 2 Bacteria and Disease Bacteria that cause disease are called pathogens Typically, they harm us with toxins that they secrete or leave behind Famous bacterial diseases: bubonic plague, tetanus, cholera, tuberculosis, etc. Antibiotics
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/15/2011 for the course BIOL 101l taught by Professor Huddleston,m during the Fall '08 term at University of Hawaii, Manoa.

Page1 / 6

DiversityofLife - 3/1/11 Chapter 20 Diversity of Life...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online