Chapter 22, Problem 3MC

An open circulatory system (a) is characteristic of squids and other active mollusks (b) permits contracting muscles to recover quickly (c) has no blood vessels (d) is a unique characteristic of annelids (e) has hemolymph, which bathes tissues directly

The main association area in the amphibian brain is the (a) cerebrum (b) medulla (c) neocortex (d) midbrain (e) arachnoid

Figure 15.24 Which of the following statements about the anatomy of a mollusk is false? a. Mollusks have a radula for scraping food. b. Mollusks have ventral nerve cords. c. The tissue beneath the shell is called the mantle. d. The mantle cavity contains hemolymph.

Which body region of an insect bears the walking legs? a. head b. carapace c. abdomen d. thorax e. trunk

Which of the following pairs of structures are homoplastic? a. the wing skeleton of a bird and the wing skeleton of a bat b. thewingofabirdandthewingofafly c. theeyeofafishandtheeyeofahuman d. the bones in the foot of a duck and the bones in the foot of a chicken e. the toes on the foot of a lizard and the toes on the foot of a human

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

Endoskeletons: a. protect internal organs and provide structures against which the force of muscle contraction can work. b. differ from exoskeletons in that endoskeletons do not support the external body. c. cannot be found in echinoderms. d. are composed of cartilaginous structures that form the skull. e. compose the arms and legs.

What is the major morphological innovation seen in annelid worms? a. a complete digestive system b. image-forming eyes c. a respiratory system d. an open circulatory system e. body segmentation

The defining trait of hominins is __________. a. tool use b. bipedalism c. a big brain d. endothermy