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WorksheetsEvidence of Common Ancestry
Total questions: 25
Worksheet time: 13mins
Which statement is supported by this cladogram?
Hippopotamuses are more closely related to cows than to javelinas.
Toothed whales are more closely related to mouse deer than to hippopotamuses.
Javelinas and pigs are more closely related than baleen whales and toothed whales.
Cows and mouse deer are more closely related than javelinas and pigs.
Which statement provides the best evidence that Ambulocetus natans is an ancestor of Basilosaurus isis?
Homologous structures occur in each fossil.
Similar nitrogenous bases are found in the DNA of each fossil.
The fossils were found in different locations.
The youngest fossil is larger than the older fossils.
The most recent shared ancestor of two different organisms/people
Ancestor
Evolution
Common Ancestor
Homology
The process by which multiple species develop and change from a common ancestor over a long period of time
Ancestor
Evolution
Common Ancestor
Homology
Similarities between the bones/structure of two different organisms due to common ancestry and evolution
Vestigial Structure
Evolution
Developmental Homology
Anatomical Homology
The similarities in organisms are due to....
Common Ancestry
Evolution
The differences in organisms are due to....
Common Ancestry
Evolution
Similarities between organisms when they are Embryos (due to common ancestry and evolution)
Vestigial Structure
Evolution
Developmental Homology
Structural Homology
A structure/organ in an organism that no longer has a purpose BUT had a purpose for the organism’s ancestors.
Vestigial Structure
Evolution
Developmental Homology
Structural Homology
What is it called when two populations of organisms are separated by physical barriers?
Gradualism
Geographic Isolation
Gradualism
Continental Drift
______: evolution occurs over a long period of time.
Gradualism
Punctuated Equilibrium
______: evolution occurs over a short period of time.
Gradualism
Punctuated Equilibrium
_____ is a branching diagram that shows the cladistic relationship between a number of species.
Cladogram
Microevolution
Continental Drift
Fossil Record
How do fossil records show common ancestry?
They show the relation between the structures of two species
They give a date of when the species were living
They show that species have not changed over the years
They show that animals with similar structures are always related
What is NOT an example of a vestigial structure?
Appendix
Pelvic bone in whales
Wings of flightless birds
Arm bones in bats
Older fossils appear in rock layers-
below new fossils
above new fossils
in the same layer as new fossils
that also have new fossils
(a) homology shows the genetic similarities between organisms.
