Critical Thinking Work-Alikes in the Space Provided, Write the Letter of the Term That Best Describes How Each Numbered Item Functions

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