Bio ch 5

As adults, certain species of whales possess baleen instead of teeth. Baleen is used to filter the whales' diet of planktonic animals from seawater. As embryos, baleen whales possess teeth, which are later replaced by baleen. The teeth of embryonic ba-leen whales are evidence that.

Baleen whales are descendants of toothed whales.

which statement represents the best explanation for the observation that the nuclear dna of domestic dogs is more similar to the DNA of the wolf than it is to the DNA from any other species

Dogs and wolves shared a common ancestor very recently.

The DNA sequence of whales and ungulates, or hooved animals, are very similar. What type of evidence of evolution is this

Molecular

What evidence for the past evolutionary relationship can be seen in different groups of vertebrates

Similar features in early stages of embryos

Members of two different species possess a similar-looking structure that they use in a similar fashion to perform the same function.

The two species share many proteins in common, and the nucleotide sequences in DNA that code for these proteins are almost identical

all vertebrates such as fish, reptiles, birds, and humans go through a stage of development with which common features

both phyrangeal arches and a tail

A mutation in the Hox genes of an organism could result in which type of change?

changes in the body plan of the organism

if an organism has a vestigial structure that structure likely once had a function in a(n)

early ancestor

Generally, within a lineage, the largest number of shared derived characters should be found among two organisms that are members of the same

family

Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsal fin and tails, as do fish, even through their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails. The dorsal fins and tails of ichthyosaurs and fish are...

homologues

the correct sequence from the most to least comprehensive of the taxonomic levels listed here is

kingdom, phylum, class, order, family, genus, and species.

the marsupial sugar glider is distinctly related to the eutherian flying squirrel. The morphological similarities of these 2 species must therefore be due to

poo

which of these can be inferred from the fact that the amino acid sequence of a certain protein in one organism resembles the amino acid sequence of the same protein in another organism

shared ancestory

When using a cladistic approach to systematics, which of the following is considered most important for classification?

shared derived characters

of the following anatomical structures which is homologous to the wing of a bat

the arm of a human

which of these is most likely indicated when two species have similar dna sequences

the species share a common ancestor

a group of species is in the same clade. which of these would not necessarily be expected to be true of the species

they would share a common ancestor

what would two closely related species have

very similar DNA sequence

what is the nonfunctional traces of pelvic bones in the humpback whale an example of

vestigal structures

Fossil evidence shows that structures considered vestigial in living organisms

were useful to their ancestors