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WorksheetsPhylogenetic Systematics
Total questions: 14
Worksheet time: 7mins
Classifying organisms by their molecular structures is?
Linnaean Classification
Phylogenetic Systematics
Molecular Classification
Molecular Sorting
Cladistic classification traces the ___________________ of organisms.
evolutionary descent
physical similarities
naming conventions
regions of origin
A common ancestor of 2 species of organisms is
the organism most closely related to a living organism
the fossil organism most like a current organism
The most recent ancestor they share
the most frequent ancestor of organisms
This group includes every descendant of an organism and excludes everything not a descendant of that organism.
Clade
Class
Kingdom
species
The branch points of a cladogram represent _____ species evolving into ____
1,5
3,2
1,2
2,1
A chart of evolutionary relationships is a...
defining characteristic
classification taxa
evolutionary tracer
cladogram
A trait evolved by the last common ancestor of a particular lineage
DNA analysis
derived characteristics
last common characteristic
shared characteristics
Why do we group snakes with reptiles when the reptile clade is defined as having limbs?
snakes ancestors evolved legs then lost them
other similarities mean we can make an exception
snakes have more traits in common with reptiles than other groups
despite the new evidence scientists kept snakes as reptiles
The lowest point at which lines from two organisms on a cladogram meet is their ______________.
derived characteristic
phylogenetic systematic
evolutionary touchpoint
common ancestor
A derived characteristic defines a _____________.
clade
character group
class
species
A ______________ is a trait all organisms in a clade have.
clade commonality
derived characteristic
domain
Taxa
The ________________ contains birds but the _____________ does not.
class Reptilia, clade Reptilia
clade Aves, class Aves
clade Reptilia, class Reptilia
clade Mammals, class Mammilia
Cladograms reflect how closely two organisms __________ matches.
RNA
external characteristics
DNA
historic classification
The more __________________ two animals share the __________ they are related.
geographic proximity, more cdistantly
behaviors, more closely
derived characteristics, more distantly
derived characteristics, more closely
