Which of the following is an example of homoplasy?a. hair in humans and fur in miceb. astragalus ankle bones in hippos and deerc. Hox genes in humans and fliesd. streamlined bodies in dolphins and ichthyosaurs

How are hypotheses about the evolutionary relationships among living organisms tested?

VISUAL SKILLS In Figure 26.4, which similarly inclusive taxon is represented as descending from the same common ancestor as Canidae?a. Felidaeb. Mustelidaec. Carnivorad. Lutra

Three living species X, Y, and Z share a common ancestor T, as do extinct species U and V. A grouping that consists of species T, X, Y, and Z (but not U or V) makes upa. a monophyletic taxon.b. an ingroup, with species U as the outgroup.c. a paraphyletic group.d. a polyphyletic group.

Which of the following correctly describe an active site? Select True or False for each statement.T/F It is the location in an enzyme where substrates bind.T/F It is the place where a molecule or ion binds to an inactive enzyme to induce a shape change to make it active.T/F It is the portion of an enzyme where chaperones bind to help enzymes fold.T/F It is the site on an enzyme where catalysis occurs.

Which of the following kingdoms or domains is a hodgepodge of different evolutionary lineages?a. Bacteria;b. Protista;c. Archaea;d. Plantae;e. Animalia

.VISUAL SKILLS Based on the tree below, which statement is correct? (A)Lizards and goats form a sister group.(B)Salamanders are a sister group to the group containing liz-ards, goats, and humans.(C)Salamanders are more closely related to lizards than to humans.(D)Goats and humans are the only sister group shown in this tree.

In Figure 33.2, which two main clades branch from the most recent common ancestor of the eumetazoans?a. Porifera and Cnidariab. Lophotrochozoa and Ecdysozoac. Cnidaria and Bilateriad. Deuterostomia and Bilateria

Explain the lock-and-key model of enzyme activity. What is incorrect about this model?