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Chapter 15
The Evolution of Microbial Life
11
Biology
Undergraduate 2
11/03/2009

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Cards

Term
Explain the 4 steps of the hypothesis for the origin of life.
Definition

1) Abiotic synthesis of organic monomers (non-living)

Examples: Sugers - Lipids - Nucleotides - 20 Amino Acids - ATP

2) Abiotic synthesis of polymers

3) Origin of self-replicating molecules: RNA

4) Formation of Pre-cell

Term
What is thought to be the 1st self-replicating molecule to evolve?
Definition
Prokaryotes
Term
Describe the Biogenesis Paradox
Definition
All life comes from a preexisting form of life.
Term
Describe prokaryotes
Definition
Small - No Membrane - Bound Organelles - No Nucleus - One Circular Chromosome - Binary Fusion - Unicellular
Term
What are the two prokaryotic Domaines?
Definition

Bacteria & Archaea

(Archaea live in extreme environments)

Term
What are the 3 typical bacterial shapes?
Definition

Sperical (cocci)

Rod Shaped (bacilli)

Spiral

Term
What is an example of disease causing bacteria
Definition
Staphyalocaccus Aureus
Term
What is an example of a helpful bacteria?
Definition
Cyanobacteria
Term
What are the 4 Eukaryotic domains
Definition
Protist - Plants - Fungus - Animal
Term
Describe a Protist
Definition
Eukaryotic - Unicellular - Not Plants, Animal or Fungus - Catch all Kingdom - Evolved over 2 BYA - Evolved from Prokaryotes
Term
What are two ways Eukaryotic cells evolved from prokaryotos
Definition
membrane enfolding and endosymbiosis
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