Bio Lab Quiz 3 (Labs 11, 2, and 3) Flashcards

1
Q

What is a genealogy

A

An ancestor and its descendants

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2
Q

What is a change in a characteristic or attribute in the descendant relative to the ancestor?

A

Modification

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3
Q

Because characters do not all change at the same rate or to the same degree, descendants are a combination of Unmodified (_________) and modified (__________) character states

A

Ancestral, Derived

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4
Q

What is a character?

A

An observable trait of an organism

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5
Q

If the character trait being observed is forelimbs, what are examples of modified character states?

A

no forelimbs, two forelimbs, or four forelimbs

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6
Q

If an ancestor does not have forelimbs but the descendant has two forelimbs, the descendant has the derived _____ _______.

A

Character state

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7
Q

What are homologous characters?

A

found in two or more species and are derived from the same structure in a common ancestor (it looks the same and is found in the same place)

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8
Q

What is apomorphy?

A

A new or descendant character state

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9
Q

What is a synapomorphy?

A

a shared derived character, an apomorphy found in two or more taxa

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10
Q

What is used to infer phylogenetic relationships?

A

Synapomorphies

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11
Q

What is plesiomorphy?

A

ancestral character state

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12
Q

What is a symplesiomorphy?

A

a shared ancestral character state

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13
Q

What does monophyletic mean?

A

All members of the group and all descendants share the same, most recent ancestor

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14
Q

What are the two assumptions on which outgroup comparison works?

A
  1. The ingroup (the group being studied) is monophyletic

2. The outgroup is not a part of the ingroup

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15
Q

Any homologous character state found in the outgroup and in the ingroup is considered _______

A

Plesiomorphic

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16
Q

Character states found in the ingroup and not in the outgroup are considered __________

A

Synapomorphic

17
Q

What is a paraphyletic group?

A

An ancestral group, but not all of its descendants are included

18
Q

What is a polyphyletic group

A

organisms that do not share the most recent common ancestor are included as one group

19
Q

What is a clade?

A

A group of taxa consisting of an ancestor taxon and all of its descendant taxa

20
Q

What does a node represent?

A

A speciation event

21
Q

What are multistate characters?

A

They exist in more than two different states; not binary (present/absent)

22
Q

What technique is used to deal with multistate characters?

A

Hennigian argumentation

23
Q

What is the evolutionary relationships among organisms?

24
Q

What is a cladogram?

A

A branching tree showing the most simple relationships between organisms

25
In the phylogenetics lab, how many skeletal and physiological characters are suggested to be analyzed?
10
26
Organisms have been classified into discrete groups, called ________, that indicate they are very similar in morphology, characters, and/or genetic makeup.
Species
27
How does the Biological Species Concept define a species?
A group of organisms that can interbreed and produce viable offspring
28
What species was discussed in the article for lab 2?
Blue-Tailed Monitor Lizard
29
What island was the new species of lizard found on?
Massau Island
30
What drove the speciation of the blue-tailed monitor lizard?
Isolation
31
What is the biogeography equation and what do the variables mean?
``` S = CA^z S = Number of Species A= Area of the Island C = The value of S and A = 1 ``` In line form: logS = zlogA + logC