Problem 2
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.
Problem 2
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.
Problem 3
Figure 15.33 Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. b. In vertebrate fishes, the pharyngeal slits become the gills. c. Humans are not chordates because humans do not have a tail. d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
Problem 3
Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. b. In vertebrate fishes, the pharyngeal slits become the gills. c. Humans are not chordates because humans do not have a tail. d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
Problem 4
Which of the following is not a feature common to most animals? a. development into a fixed body plan b. asexual reproduction c. specialized tissues d. heterotrophic nutrient sourcing
Problem 5
Which of the following does not occur? a. radially symmetrical diploblast b. diploblastic eucoelomate c. protostomic coelomate d. bilaterally symmetrical deuterostome
Problem 6
The large central opening in the poriferan body is called the _____. a. emmule b. picule c. stia d. osculum
Problem 7
Cnidocytes are found in _____. a. phylum Porifera b. phylum Nemertea c. phylum Nematoda d. phylum Cnidaria
Problem 8
Cubozoans are _____. a. polyps b. medusoids c. polymorphs d. sponges
Problem 9
Which group of flatworms are primarily external parasites of fish? a. monogeneans b. trematodes c. cestodes d. turbellarians
