Bio Flashcards

0
Q

Systematics

A

Classifies organisms and determines evolutionary relationships

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1
Q

Phylogeny

A

Evolutionary history of a species or a group of related species

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2
Q

Taxonomy

A

Ordered division and naming of organisms

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3
Q

Binomialp

A

The two part scientific name of a species

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4
Q

Genus

A

The first part of the name

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5
Q

The taxonomic groups from broad narrow

A

Domain, kingdom, phylum, class, order, family

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6
Q

Taxonomic unit at any level of hierarchy

A

Taxon

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7
Q

What depicts evolutionary relationships

A

Phylogenic trees

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8
Q

What does the branch point represent on the phylogenic tree

A

Divergence of the species

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9
Q

What are sister taxa

A

Groups that share an immediate common ancestor

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10
Q

What is similarly due to convergent evolution

A

Analogy

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11
Q

What is an outgroup

A

A group that has diverged before the ingroup

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12
Q

What is the ingroup

A

The various species being studied

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13
Q

A network of sugar polymers cross-linked by polypeptides is called what

A

Poptidoglycan

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14
Q

What is gram stain used for?

A

To classify bacteria by cell wall composition

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15
Q

What kind of bacteria have simpler walls with a large amount of peptidoglycan

A

Gram positive

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16
Q

What kind of bacteria have less peptidoglycan and an outer membrane that can be toxic?

A

Gram negative

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17
Q

A polysaccharide or protein layer on many prokaryotes is called…

A

A capsule

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18
Q

Fimbriae

A

Allow prokaryotes to stick to their substrate or other individuals in a colony

19
Q

Taxis

A

The ability to move toward or away from a stimulus

20
Q

Endoscopes

A

Formed by prokaryotes. They can remain viable in harsh conditions for centuries

21
Q

Obligate

A

Require O2 for cellular respiration

22
Q

Obligate anaerobes

A

Poisoned by O2 and use fermentation

23
Q

Anaerobic respiration

A

Something obligate anaerobes use other than fermentation

24
Facultative anaerobes
Can survive with or without O2
25
Nitrogen fixation
When prokaryotes convert atmospheric nitrogen to ammonia
26
Prokaryotes
Most are unicellular
27
Hererocysts
In cyanobacterium, these are photosynthetic cells and nitrogen-fixing cells that exchange metabolic products
28
Photoautotroph
Energy from light. need CO2 as carbon source
29
Chemoautotroph
Energy from chemicals. Need co2 as carbon source
30
Photoheterotroph
Energy from light. Organic compounds as carbon source
31
Chemoheterotroph
Organic compounds as energy and carbon source
32
Biofilms
Surface coating colonies where metabolic cooperation occurs.
33
Extremophiles
Archaea that live in extreme environments
34
Extreme halophiles. They are archaea
Live in highly saltine environments
35
Extreme thermopiles. They are archaea
Thrive in very hot environments
36
Methanogens. They are archaea
Live in swamps, marshes, produce methane as a waste product.
37
Decomposes
Chemoheterotrophic prokaryotes. Break down dead organisms
38
Symbiosis
Ecological relationship in which two species live in close contact
39
Host
The larger species
40
Symbiont
The smaller species
41
Mutualism
Both symbiotic organisms benefit
42
Commensalism
One organism benefits while neither harming more helping the other
43
Parasitism
When a parasite harms but doesn't kill the host
44
Pathogen
Parasites that cause disease
45
Exotoxins
Are secreted and cause disease even if the prokaryotes that produce them aren't present
46
Endotoxins
Released only when bacteria die and their cell wall breaks down