Chapter 22, Problem 12MC

What do scientists in the field of systematics accomplish? a. discover new fossil sites b. organize and classify organisms c. name new species d. communicate between field biologists

Squamata includes _____. a. crocodiles and alligators b. turtles c. tuataras d. lizards and snakes

Frogs belong to which order? Anura Urodela Caudata Apoda

Which situation would most likely lead to allopatric speciation? a. A flood causes the formation of a new lake. b. A storm causes several large trees to fall down. c. A mutation causes a new trait to develop. d. An injury causes an organism to seek out a new food source.

Crustaceans are _____. a. ecdysozoans b. nematodes c. arachnids d. parazoans

Echinoderms in their larval state have ______. a. triangular symmetry b. radial symmetry c. hexagonal symmetry d. bilateral symmetry

Reptiles, including birds, belong to one major lineage of amniotes, and________ belong to another. a. sharks c. mammals b. frogs and toads d. salamanders

Figure 12.3 In what levels are cats and dogs considered to be part of the same group?

Cnidocytes are found in _____. a. phylum Porifera b. phylum Nemertea c. phylum Nematoda d. phylum Cnidana