Invertebrate Animals

Question 1

simplest animal with brain

Answer 1

worms

Question 2

has a hard outer covering (exoskeleton)

Answer 2

arthropods

Question 3

has internal skeleton (endoskeleton)

Answer 3

enchinoderms

Question 4

has an organ called a foot

Answer 4

mollusks

Question 5

have stinging cells

Answer 5

cnidarians

Question 6

adults stay in one place

Answer 6

sponges

Question 7

bilateral symmetry

Answer 7

worms

Question 8

legs, wings, and antennae are possible appendages

Answer 8

arthropods

Question 9

radial symmetry

Answer 9

echinoderms, cnidarians

Question 10

thin layer of tissue called mantel cover internal organisms

Answer 10

mollusks

Question 11

asymmetrical

Answer 11

sponges

Question 12

three major phyla are round, segmented, and flat

Answer 12

worms

Question 13

three major groups are arachnid, insect, and crustacean

Answer 13

arthropods

Question 14

includes starfish, sea stars, sea cucumbers, and sea urchins

Answer 14

echinoderms

Question 15

three major groups are gastropods, bivalves, and cephalopods

Answer 15

mollusks

Question 16

includes jellyfish, coral, sea anemones, and hydra

Answer 16

cnidarians

Question 17

have some specialized cells but no tissues or organs

Answer 17

sponges