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Which organism is the most ancient?
Which of the following organisms would have the fewest
similarities with species A?
The most recent common ancestor of H and J is ____.
The most recent common ancestor of K and J is ____.
Which of the following organisms would have the most
structures in common with species P?
Knowledge of which of the following would have been
most helpful in creating this phylogenetic tree?
amino acid sequences
The table shows an amino acid comparison of cytochrome c, a protein involved in cellular respiration in aerobic organisms. The two organisms in the table that are least genetically related are the —
silkworm moth and the fruit fly
silkworm moth and the screwworm fly
fruit fly and the screwworm fly
fruit fly and the hornworm moth
The organism that is most related to the fruit fly is most likely the —
cannot be determined
How does comparing cytochrome c protein provide genetic evidence for common ancestry?
cytochrome c is actually made from nucleotides
the information for making proteins is found in the DNA
proteins and DNA are the same type of molecules
cytochrome c is the only protein composed of amino acids
The drawings show a turtle embryo and a chicken embryo. Which of the following statements is supported by the similarities between these embryos?
The turtle is more advanced than the chicken.
The chicken has more offspring than the turtle.
The turtle and the chicken are similar as adults.
The chicken and the turtle share a common ancestor.
Scientists can use the amino acid sequence in proteins to determine the evolutionary relationships of different species. Which species is the most closely related to Species P?
Species P: CYS GLU ASN ALA SER
Species Q: CYS GLU THR ISO GLN
Species R: PRO GLU THR ALA ASN
Species S: CYS ASP ASN ALA SER
Species T: GLY GLU ASN ISO ASN
The anatomical similarities shown to the right provide evidence for a common ancestor for all of these organisms because all of the forelimbs –
perform the same function
are found in invertebrates
contain similar structures
contain identical proteins
According to the diagram, which of the following is the closest relative to a sting ray?
What is the most recent common ancestor of gar and lungfish?
Which statement describes the best evidence that two species share a recent common ancestor?
The species are about the same size.
The species eat the same type of food.
The species live in the same ecosystem.
The species have similar DNA sequences.
What scientist first proposed the theory of evolution?