Chapter Questions
Which of these protists is hypothesized to be ancestral to animals?a. a green algal protistc. an amoeboid protistb. a choanoflagellated. a slime mold
Which of the following is not a feature of a coelomate?a. radial symmetryb. three germ layersc. a body plan including a complete digestive tractd. organ level of organization
The evolution of bilateral symmetry allowed fora. multicellularity.c. the notochord.b. germ layers.d. cephalization.
Sponges are classified asa. eumetazoans.c. protists.b. parazoans.d. vertebrates.
Cnidarians are organized at the tissue level because they containa. ectoderm and endoderm.b. ectoderm.c. ectoderm and mesoderm.d. endoderm and mesoderm.e. mesoderm.
A feature of annelids isa. a segmented body.b. a coelom.c. a saclike body.d. radial symmetry.
What characteristic is common to the flatworms, molluscs, and annelids?a. All have bilateral symmetryb. All are acoelomates.c. All are parazoans.d. All are vertebrates.
Gastropods and cephalopods are examples ofa. molluscs.b. annelids.c. flatworms.d. None of these are correct.
Which of the following is not a feature of an insect?a. compound eyesb. eight legsc. antennaed. an exoskeletone. jointed legs
Elephantiasis and trichinosis are diseases caused bya. mites.b. spiders.c. insects.d. roundworms.
Which of the following is not a feature of mammals?a. hairb. milk-producing glandsc. ectothermic capabilityd. four-chambered hearte. diaphragm to help expand lungs
Unlike bony fishes, amphibians havea. ears.b. jaws.c. a circulatory system.d. a heart.
Mammals are distinguished from other animals based ona. size and hair type.b. mode of reproduction.c. number of limbs and method of caring for young.d. number of mammary glands and number of offspring.
The first humanlike feature to evolve in the hominins wasa. a large brain.b. massive jaws.c. a slender body.d. bipedal locomotion.
Which of the following is an anthropoid but not a hominid?a. humanb. gibbonc. orangutand. chimpanzeee. gorilla
The replacement model supports which of the following in the evolution of modern humans?a. evolution of bipedalismb. evolution of brain sizec. distribution of modern humans across the planetd. development of culture