Ch.16 Learning Curve
Terms in this set (13)
A group of biologists is studying the evolutionary relationships of crickets. The biologists also include grasshoppers in their study to help determine which traits are ancestral in crickets. In this study, the crickets represent the
Biologists would use aphylogenetic tree to
Classify a newly discovered species
Fossil evidence in phylogenetic systematics cannot
a) help determine whether traits are derived or ancestral.
b) be found in abundance for most lineages.
c) reveal when lineages diverged.
d) provide information about what ancestral organisms looked like.
e) tell us where and when organisms lived.
Be found in abundance for most lineages
Similar traits that arise independently in different lineages through convergent evolution are called
A group of species that consists of a common ancestor and all of its evolutionary descendants is called a
GenBank is a
large database of DNA sequence information.
Any _______ trait can be used in a phylogenetic analysis.
To help establish the timing of evolutionary divergence, biologists develop
Females of some bird species prefer computer-generated songs that are more complex than songs they normally hear from males during courtship. Such observations
support the sensory exploitation hypothesis.
Why is phylogeny a useful basis for biological classification?
It has a hierarchical framework for grouping organisms that can readily be adopted by biologists worldwide.
Scientists develop molecular clocks to
a) reconstruct ancestral states.
b) estimate when lineages diverge.
c) reconstruct past events.
d) reveal convergent evolutionary processes.
e) compare and contrast living organisms.
Estimate when lineages diverge
Derived traits that are shared among a group of organisms are called
The number of synapomorphies and homoplasies that were assumed in constructing each tree. According to the principle of parsimony, which tree is best?
The one that has the fewest number of homoplasies