Biodiversity: prokaryotes, protists & viruses Chapter 10.14 – 10.17 & Chapter 13.

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Presentation transcript:

Biodiversity: prokaryotes, protists & viruses Chapter – & Chapter 13

All three domains contain microscopic organisms. Focus now: Prokaryotes

Prokaryotes in general Domains bacteria & archaea Bacteria on the point of a pin, magnified 650x

Characteristics used to classify Domain Bacteria

Shape of cells

Characteristics of bacteria cell wall Two types of cell walls; use a Gram stain to identify type Gram + Gram –

Modes of Nutrition “organic feeders” “rock feeders” “light self feeders”

Characteristics of Domain Archaea

All three domains contain microscopic organisms. Focus now: Domain Eukarya

Kingdom Protista (multiple kingdoms ?)

Protists cont.

What about viruses? What is a virus? It’s not a cell...

Two kinds of viruses DNA viruses – RNA viruses

Who is at risk? Practically everything;