USABO Biosystematics Exam
Questions With 100% Verified Answers
Taxon -
correct answer ✅a taxonomic group of any rank, such as a
species, family, or class.
Sister Taxa -
correct answer ✅Groups of Organisms which share an immediate
common ancestor
Rooted Tree -
correct answer ✅Phylogenetic Tree in which a branch point within
a tree (often furthest to left) is the most recent common ancestor
for all taxa in tree
Basal Taxon -
correct answer ✅Lineage that diverges early in the history of a
group and thus lies on a branch that originates near the common
ancestor of the group
Polytomy -
correct answer ✅Branch Point in which more than two
descendant groups emerge
, USABO Biosystematics Exam
Questions With 100% Verified Answers
Homologies -
correct answer ✅Phylogenetic and Genetic similarities due to
descent from common ancestor
Analogies -
correct answer ✅Phylogenetic and Genetic similarities due to
convergent evolution, or similar conditions but
geographically/temporally separate evolution (arose independently
of each other).
Homoplasies -
correct answer ✅Character shared by species but not held by
common ancestor/basal taxon
Clades -
correct answer ✅Groups of species organized into an ancestral
species and all descendants
Monophyletic -
correct answer ✅Taxon/Clade which consists of an ancestral
species and ALL descendants. Definition of Clade.
Questions With 100% Verified Answers
Taxon -
correct answer ✅a taxonomic group of any rank, such as a
species, family, or class.
Sister Taxa -
correct answer ✅Groups of Organisms which share an immediate
common ancestor
Rooted Tree -
correct answer ✅Phylogenetic Tree in which a branch point within
a tree (often furthest to left) is the most recent common ancestor
for all taxa in tree
Basal Taxon -
correct answer ✅Lineage that diverges early in the history of a
group and thus lies on a branch that originates near the common
ancestor of the group
Polytomy -
correct answer ✅Branch Point in which more than two
descendant groups emerge
, USABO Biosystematics Exam
Questions With 100% Verified Answers
Homologies -
correct answer ✅Phylogenetic and Genetic similarities due to
descent from common ancestor
Analogies -
correct answer ✅Phylogenetic and Genetic similarities due to
convergent evolution, or similar conditions but
geographically/temporally separate evolution (arose independently
of each other).
Homoplasies -
correct answer ✅Character shared by species but not held by
common ancestor/basal taxon
Clades -
correct answer ✅Groups of species organized into an ancestral
species and all descendants
Monophyletic -
correct answer ✅Taxon/Clade which consists of an ancestral
species and ALL descendants. Definition of Clade.
