Diversity of Life Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

analogous structure

A

a character found in two taxa that looks similar because of convergent evolution, not because of descent from a common ancestor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

binomial nomenclature

A

a system of two-part scientific names for an organism, which includes genus and species names

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

branch point

A

a point on a phylogenetic tree where a single lineage splits to distinct new ones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Clade

A

a group of taxa with the same set of shared derived characters, including an ancestral species and all its descendants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

cladistics

A

a method used to organize homologous traits to describe phylogenies using common descendent as the primary criterion used to classify organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Class

A

the category in the taxonomic classification system that falls within phylum and includes orders

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

domain

A

the highest level category in the classification system and that includes all taxonomic classifications below it; it is the most inclusive taxon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

family

A

the category in the taxonomic classification system that falls within order and includes genera

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

genus

A

the category in the taxonomic classification system that falls within family and includes species; the first part of the scientific name

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Kingdom

A

the category in the taxonomic classification system that falls within domain and includes phyla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

maximum parsimony

A

applying the simplest, most obvious way with the least number of steps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Molecular Systematics

A

the methods of using molecular evidence to identify phylogenetic relationships

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

monophyletic group

A

(also, clade) organisms that share a single ancestor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Order

A

the category in the taxonomic classification system that falls within class and includes families

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Phylogentic Tree

A

diagram used to reflect the evolutionary relationships between organisms or groups of organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Phylogeny

A

evolutionary history and relationship of an organism or group of organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Phylum

A

the category in the taxonomic classification system that falls within kingdom and includes classes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Rooted

A

describing a phylogenetic tree with a single ancestral lineage to which all organisms represented in the diagram relate

19
Q

Shared Ancestral Character

A

a character on a phylogenetic branch that is shared by a particular clade

20
Q

Shared Derived Character

A

a character on a phylogenetic tree that is shared only by a certain clade of organisms

21
Q

Sister Taxa

A

two lineages that diverged from the same branch point

22
Q

Species

A

the most specific category of classification

23
Q

Systematics

A

the science of determining the evolutionary relationships of organisms

24
Q

taxon

A

a single level in the taxonomic classification system

25
Q

taxonomy

A

the science of classifying organisms

26
Q

What are the three levels of domains?

A

Bacteria, Archaea, and Eukarya

27
Q

What is the second level of a domain called?

A

Kingdom, and can have several

28
Q

What are the subsequent categories of increasing specificity?

A

phylum, class, order, family, genus, and species

29
Q

The genus and species names are…?

A

Italicized

30
Q

Taxon is…?

A

capitalized

31
Q

All members of a taxon should have…?

A

a common ancestor and be more closely related to each other than to members of other taxa

32
Q

What are the limitations of phylogenetic trees?

A

assuming two species that look alive are closely related (not always) and branches do not show length of time

33
Q

Homologous traits share…?

A

an evolutionary path that led to the development of that trait

34
Q

Analogous traits

A

do not share an evolutionary path, (convergent evolution), and not because of a close evolutionary relationship

35
Q

Molecular characters can include…?

A

differences in the amino-acid sequence of a protein, differences in the individual nucleotide sequence of a gene, or differences in the arrangements of genes

36
Q

Do different genes change evolutionarily at different rates…?

A

Yes, and it affects how useful they are in finding relationships

37
Q

Rapidly evolving sequences are…?

A

are useful for determining the relationships among closely related species

38
Q

Slow evolving sequences are…?

A

useful for determining the relationships between distantly related species

39
Q

Clades must include…?

A

the ancestral species and all of the descendants from a branch point. Can vary in size. Organisms stem from single point on the tree

40
Q

The three assumptions of cladistics…?

A

The first is that living things are related by descent from a common ancestor.
The second is that speciation occurs by splits of one species into two, never more than two at a time, and essentially at one point in time.
The third assumption is that traits change enough over time to be considered to be in a different state

41
Q

Cladistics compares…?

A

Ingroups and Outgroups .

42
Q

Ingroups

A

the group of taxa being analyzed

43
Q

Outgroups

A

is a species or group of species that diverged before the lineage containing the group(s) of interest