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15 Cards in this Set

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  • Back
Heritable changes in DNA underlying morphological differences between lineages _______________.

a. may have been caused mostly by transposons
b. affected the onset, rate, and time of development steps
c. both a and b
C. both a and b
-may have been caused mostly by transposons.
-affected the onset, rate, and time of development steps
Morphological convergences may lead to ______________.
a. analogous structures
b. homologous structures
c. divergent structures
d. both a and c
A. anlaogous structures
A classification system that is _________ is based on presumed evolutionary relationship.

a. epigenetic
b. credited to Linnaeus
c. phylogenetic
d. both b and c
C. phylogenetic
"Pinus banksiana", "Pinus strobus", and "Pinus radiata" are ___________.

a. three families of pine trees
b. three different names for the same organixm
c. several species belonging to the same genus
d. both and c
C. several species belonging to the same genus
Increasigly inslusive taxa range from __________ to __________.

a. kingdom; species
b. kingdom; genera
c. genera; kingdom
d. species; kingdom
D. species; kingdom
What is the 'accumulation of neutral mutations'?
molecular clock
What is 'stone hard evidence of life in past'
fossil
what is 'similar body parts in different lineages owing to common descent'
homology
e.g., shark fins, penguin flippers
analogy
evolutionary relationship among species, ancestors to descendants
phylogeny
layers of sedimentary rocks
stratification
Define 'Macroevolution'
evolution theorized to occur over a long period of time, producing major changes in species and other taxonomic groups
Define 'Microevolution'
minor change within a species or small group of organisms, usually within a short period of time
What is the difference between 'homologous and analogous structures'?
Homologous-same body parts that are modified in different ways from a common ancestor.
Analogous-body parts that once differed, but converged in structure and function in response to similar environmental pressures.
What is the difference between 'morphological divergence and convergence'?
Convergence- tendency of different species to develop similar characteristics in response to a set of environmental conditions.

Divergence-development of different characteristics by organisms that come from the same ancestor, caused by the influence of different environments.