Evidence of Common Ancestry Review

When looking at DNA to determine a common ancestor, what characteristic do scientists look for?

• The quantities of nitrogen bases

• The sequence of nitrogen bases

• The pairing of nitrogen bases

• The bonding of nitrogen bases

Two separate organisms showing structural similarities, such as the forelimbs of birds and reptiles is an example of -

• a fossil record.

• a homology.

• a biogeography.

• an analogy.

All the following methods are used to evaluate common ancestry among groups, EXCEPT–

• DNA.

• anatomical homology.

• fossil record.

• physical characteristics.

The study of the similarities among species in the fossil record shows that–

• all species evolved independently.

• there is not much evidence supporting a relatedness of different species.

• each separate species came from the same geographic location.

• organisms have a common ancestry.

Which is the best list describing evidence used to support common ancestry?

• DNA and amino acid sequences

• Biogeography and fossil record

• Homologies, vestigial organs, and fossil record

• DNA, amino acids, fossil record, and homologies

Homology

• Descent with modification

• A single organism or species that gives rise to multiple distinct organisms or species through diverging lines of descent

• Two characteristics that are similar because they originated from a common ancestor

Common Ancestor

• Two characteristics that are similar because they originated from a common ancestor

• A single organism or species that gives rise to multiple distinct organisms or species through diverging lines of descent

• Descent with modification

Evolution

• Descent with modification

• Two characteristics that are similar because they originated from a common ancestor

• A single organism or species that gives rise to multiple distinct organisms or species through diverging lines of descent