General Biology

4.5 Which of the following statements is FALSE? a. Mammals are vertebrates. b. Invertebrates have no backbone. c. There are more vertebrate species than invertebrate. d. The phylogenetic tree of animals begins with sponges. 5.5 Major trends in the evolution of animals include a. cephalization, the development of a definite head region. b. the development of types of symmetry. c. variation in coelomic cavities. d. all of these 6.5 The most successful of the invertebrate phyla with respect to the numbers of species is a. Annelida b. Arthropoda c. Mollusca d. Nematoda 7.5 The second greatest number of species in an animal phylum is found in a. Nematoda b. Mollusca c. Cn... click for more

General Biology

The organs of excretion in flatworms are a. nephridia. b. contractile vacuoles. c. Malpighian tubules d. protonephridia. Animals that are hermaphroditic usually a. fertilize their own eggs. b. cross-fertilize. c. donate eggs to other individuals d. all of these A scolex is a. the anterior attachment organ of a tapeworm. b. the feeding organ of a fluke. c. an appendage of a sandworm. d. The egg of a sea star. Which have a tough cuticle, a false coelom, and a complete digestive system and are facultative anaerobes? a. roundworms b. cnidarians c. flatworms d. proferia A segmented body plan is common to each group EXCEPT a. arthropods b. chordates c. annelids d... click for more

General Biology

All of the following adaptations have contributed to the success of the insects EXCEPT a. specialized sensory organs b. wings c. small body size d. aquatic habitat A water-vascular system is characteristic of the a. arthropods b. annelids c. chordates d. echinoderms Which of the following is not a member of the phylum Platyhelminthes? a. a fluke b. an annelid c. a planarian d. a tapeworm The ______ are bilateral, coelomate, segmented worms that have complex organ systems. a. ribbon worms b. annelids c. roundworms d. tapeworms Spiders, ticks, and mites are a. arthropods b. arachnids ... click for more

General Biology

There are three major classes of Cephalopods. Which of the following is a Cephalopod? a. Squid b. Conch c. Clam d. Snail Which type of Cnidarian body plan is less motile? a. larvae b. worm c. Polyp d. medusa What moves the Gastric Mill? A. wings B. tendons C. ligaments D. muscles What are the structures called where blood enters the heart? A. artia B. ostium C. arteries D. veins Where is food ground up? A. pyloric stomach B. gastric stomach C. gizzard D. crop What provides the major force for backward swimming? A. uropods B. chelopeds C. telson D. rostrum What muscle causes the mandibles to come together? A. mandibular adductor musc... click for more

General Biology

What are the organs used for sperm storage from another worm? A. seminal receptacle B. seminal vesicle C. seminiferous tubules D. clitellum What part of the digestive system is thick and very muscular A. clitellum B. crop C. gizzard D. intestine What are the "Hearts" of a worm called? A. arteries B. aortic arches C. auricles D. ventricles What is the "Brain" of the worm? A. brain B. cerebrum C. subpharangeal ganglion D. suprapharyngeal ganglia What is the organ called that is responsible for mucous production during reproduction? A. prothallus B. prostomium C. segment D. clitellum What part of the digestive system is thin and not very muscular A. crop B. ... click for more