Invertebrate Animals

Question 1

porifera

Answer 1

organisms with bodies full of pores and channels (ex: sponges)

Question 2

cnidaria

Answer 2

organisms with jelly-like bodies and specialized cells used for catching prey (ex: jellyfish)

Question 3

annelida

Answer 3

segmented worms (ex: earthworms, leeches)

Question 4

hydroid

Answer 4

life stage for most animals of the class Hydrozoa, small predators related to jellyfish

Question 5

jellyfish

Answer 5

gelatinous animals that can sting

Question 6

platyhelminthes

Answer 6

flatworms

Question 7

nematoda

Answer 7

roundworms

Question 8

pinworms

Answer 8

small parasites that live in the colon and rectum when their eggs are swallowed

Question 9

tapeworms

Answer 9

parasites that live in the intestines after food or water containing their eggs is eaten

Question 10

bivalves

Answer 10

molluscs whose bodies are enclosed by shells with two hinged parts (ex: clams, oysters)

Question 11

gastropods

Answer 11

land molluscs with a univalve shell (ex: snails)

Question 12

coelomate

Answer 12

fluid-filled body cavity with organs (molluscs, arthropods, echinoderms, chordates)

Question 13

acoelomate

Answer 13

no body cavity (jellyfish, flatworms)

Question 14

radial symmetry

Answer 14

symmetry around a center (starfish, jellyfish)

Question 15

bilateral symmetry

Answer 15

two symmetrical sides (humans)

Question 16

tentacle

Answer 16

flexible appendage used for grasping, moving, or sensing

Question 17

cnidocyte

Answer 17

explosive cells that animals of the phylum Cnidaria have

Question 18

ectoderm

Answer 18

outermost layer of cells/tissues of an embryo in early development

Question 19

endoderm

Answer 19

innermost layer of cells/tissues of an embryo in early development

Question 20

ovary

Answer 20

female reproductive organ in which eggs are produced

Question 21

teste

Answer 21

male sex gland that produces and stores sperm