INTRODUCTION TO ANIMALS QUIZ1. Among the characteristics unique to animals is a. gastrulation. b. multicellularity. c. sexual reproduction. d. flagellated sperm. e. heterotrophic nutrition. 2. Acoelomates are characterized by a. the absence of a brain. b. the absence of mesoderm. c. deuterostome development. d. a coelom that is not completely lined with mesoderm. e. a solid body without a cavity surrounding internal organs. 3. Which of the following subdivisions of the animal kingdom encompasses all the others in the list? a. Protostomesb. Bilateriansc. Radiansd. Eumetazoans (those with true tissues)e. Deuterostomes4. Which characteristic below is shared by plants, fungi, and animals?a. They all have cell walls. b. All are eukaryotes. c. All obtain nutrition through ingestion.d. All possess the same types of tissues. 5. During the development of most animals, cleavage leads to _____.a. the formation of a zygote b. the formation of a blastula c. the formation of a gastrula d. fertilization e. metamorphosis 6. Which example below is a common feature of all animals?a. bilateral symmetry b. obtain nutrition through absorptionc. a true coelom d. dominant haploid stagee. none of the above7. Ectoderm can give rise to _____; mesoderm can give rise to _____; endoderm can give rise to _____.a. muscle ... the outer covering of the animal ... the central nervous system b. the lining of the digestive tract ... muscle ... the outer covering of the animal c. the central nervous system ... the outer covering of the animal ... the lining of the digestive tube d. muscle ... the outer covering of the animal ... the lining of the digestive tube e. the central nervous system ... muscle ... the lining of the digestive tube8. A true coelom is _____.a. a body cavity lined with tissues derived from the endoderm b. a body cavity lined with endoderm and mesoderm c. a body cavity lined with mesodermd. any coelomate, pseudocoelomate or acoelomate 9. The difference between pseudocoelomates and coelomates is that pseudocoelomates _____, whereas coelomates _____.a. do not have a body cavity ... have a body cavity b. exhibit radial symmetry ... exhibit bilateral symmetry c. are protostomes ... are deuterostomes d. have a body cavity partially lined with tissue derived from mesoderm ... have a body cavity completely lined with tissue derived from mesoderm 10. The presence of a coelom is advantageous because _____.a. it allows for a third embryonic germ layer b. it permits the development of an open circulatory system c. it allows room for the development and movement of internal organs d. it is necessary for a complete digestive tract e. all of these 11. Which example below is not a major feature of animal body plans?a. symmetry b. type of eye c. organization of tissues d. body cavities e. mode of development (protostome or deuterostome) 12. Protostomous animals are those in which the _____.a. blastopore forms the mouth b. blastopore forms the anusc. ectoderm forms the muscles d. digestive tract is incomplete e. mesoderm forms appendages 13. One of the two taxa that molecular studies divide the protostomes into is called Ecdysozoa. What characteristic is this taxon named for?a. a horseshoe-shaped crown of ciliated tentacles b. a trochophore larvac. the secretion of stiff external skeletons that must be shed to allow for growth d. segmented bodiesAnswers:1. a2. e3. d4. b5. b6. e7. e8. c9. d10. c11. b12. a13.
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