Name ______________________________ Class___________________Date__________________ Skills Worksheet Critical Thinking Work-Alikes In the space provided, write the letter of the term that best describes how each numbered item functions. _____ 1. nephridium a. windshield ice scraper _____ 2. movement by gastropod foot b. waste filter c. distance swimmer _____ 3. gastropod radula d. water-slide toy _____ 4. tunneling of earthworms e. soil aerator _____ 5. trochophore larva Cause and Effect In the space provided, write the letter of the phrase that best matches each cause or effect given below. Cause Effect 6. _________________ enabled development of a. terrestrial slugs and gut and internal organs snails b. members of the 7. _________________ genus Helix raised jet propulsion on farms c. evolution of coelom in mollusks 8. parapodia with setae ___________________ d. mantle cavity of cephalopod closes quickly 9. _________________ damage to gardens e. swimming, burrowing, or crawling 10. land snails can be _________________ food for humans Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Biology 14 Mollusks and Annelids Name ______________________________ Class___________________Date__________________ Critical Thinking continued Trade-Offs In the space provided, write the letter of the bad news item that best matches each numbered good news item below. ` _____ 11. Some bivalves have sensory cells a. Most cephalopods lack an outer that respond to light and touch. shell. _____ 12. Some bivalves can move quickly by b. Most are sessile. using adductor muscles. c. Bivalves lack a head. _____ 13. Squids and cuttlefish have an d. Some suck blood from mammals. internal shell. _____ 14. Most leeches are small. Linkages In the spaces provided, write the letters of the two terms or phrases that are linked together by the term or phrase in the middle. The choices can be placed in any order. 15. ______ common ancestry _____ a. gastropods b. mollusk trochophore larva 16. ______ bivalves ______ c. grain of sand 17. ______ mantle _______ d. visceral mass e. contraction of annelid circular 18. ______ organic material ______ muscles f. gizzard 19. ______ layers of nacre _______ g. soil from earthworm pharynx to 20. ______ crop ________ esophagus h. water moving over sticky gills of 21. ______ contraction of annelid the bivalve i. cephalopods longitudinal muscles ______ j. foot k. cilia directing food to bivalve’s mouth l. pearl m. annelid trochophore larva n. movement Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Biology 15 Animal Behavior Name ______________________________ Class___________________Date__________________ Critical Thinking continued Analogies An analogy is a relationship between two pairs of terms or phrases written as a : b :: c : d. The symbol : is read as “is to,” and the symbol :: is read as “as.” In the space provided, write the letter of the pair of terms or phrases that best completes each analogy shown. _____ 22. trochophore larva : mollusks :: a. visceral mass : annelids c. three-part body plan : annelids b. trochophore larva : annelids d. valve system : annelids _____ 23. bivalve feeding : siphon :: a. gastropod feeding : radula c. gastropod feeding : beak b. gastropod feeding : tentacle d. cephalopod breathing : siphon _____ 24. mollusk tentacles : long fingers :: a. annelid septa : compartments c. annelid parapodia : short legs b. annelid mouths : scrapers d. annelid setae : eggs _____ 25. blood : circulatory system :: a. sperm : intestine c. blood : pharynx b. soil : pharynx d. coelomic fluid : nephridia Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Biology 16 Mollusks and Annelids .