Evolution of Microbes Flashcards

1
Q

What do all living organisms, without exception, possess

A

Ribosomes

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2
Q

What are ribosomal RNA’s

A

building blocks of ribosomes involved in translating mRNA to proteins

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3
Q

What is phylogenetics

A

The evolutionary relationships between organisms

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4
Q

what is the eocyte hypothesis?

A

There are only 2 domains - bacteria and archaea - with eukaryotes embedded in archaea

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5
Q

what makes up the prokaryotes

A

Archaea and bacteria

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6
Q

what is larger, eukaryotes or prokaryotes?

A

eukaryotes

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7
Q

What are the differences in the structures of prokaryotes and eukaryotes?

A

Prokaryotes: Haploid, Nucleoid and no organelles
Eukaryotes: Diploid, nucleus and organelles

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8
Q

What is LUCA?

A

Last Universal Common Ancestor

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9
Q

When is LUCA estimated to have appeared

A

4.5 billion years ago

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10
Q

what is meant by anoxic?

A

No O2 in atmosphere

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11
Q

What are cyanobacteria

A

The first organisms on earth to conduct oxygenic photosynthesis

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12
Q

what is endosymbiosis

A

one organism lives inside an other one to form a single organism

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13
Q

What resulted in the origin of eukaryotes

A

endosymbiosis of bacteria in archaea

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14
Q

what is the org. of organelles in eukaryotes

A

bacteria

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15
Q

What has a greater metabolic diversity, Eukaryotes or bacteria and archaea

A

bacteria and archaea

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16
Q

How do eukaryotes metabolise

A

oxygen respiration with glucose

17
Q

how do bacteria and archaea metabolise?

A

Methganogenesis
autotrophic ammonia oxidation
sulphate reaction with acetate

18
Q

How do organisms face environmental changes and avoid extinction

A

adapt

19
Q

What is adaption?

A

genomic and phenotypic changes

20
Q

what are the 2 mechanisms of evolution

A

Horizontal gene transfer

mutation

21
Q

how do microbes reproduce

A

horizontal gene transfer

22
Q

What is horizontal gene transfer

A

exchange of genetic material from one organism to another that is not its offspring