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Question 1

vertebrates

Answer 1

a backboned animal

Question 2

invertebrates

Answer 2

a non-backboned animal

Question 3

consumer

Answer 3

an organism that generally obtains food by feeding on other organisms or organic matter

Question 4

ganglion

Answer 4

a mass of nerve cells

Question 5

gut

Answer 5

the digestive tract

Question 6

coelom

Answer 6

a body cavity that contains the internal organs

Question 7

bilateral symmetry

Answer 7

the property of being divisible into symmetrical halves on either side of a unique plane

Question 8

radial symmetry

Answer 8

symmetry around a central axis as in a starfish or a tulip flower

Question 9

asymmetry

Answer 9

lack of symmetry

Question 10

sponges

Answer 10

is an animal that grows in one spot like most plants do

Question 11

cnidarians

Answer 11

an aquatic invertebrate animal of the phylum cnidaria

Question 12

flatworms

Answer 12

phylum of relatively simple soft-bodied invertebrate animals

Question 13

roundworms

Answer 13

diverse animal phylum inhabiting a broad range of environments

Question 14

mollusks

Answer 14

snails, slugs, mussels, and octopuses

Question 15

open circulatory system

Answer 15

a circulatory system in which the circulatory fluid is not contained entirely within vessels

Question 16

closed circulatory system

Answer 16

a circulatory system in which the heart circulates blood through a network of blood vessels that form a closed-loop

Question 17

annelid worms

Answer 17

ringed worms or segmented worms, are a large phylum with over 22000 extant species

Question 18

exoskeleton

Answer 18

a hard external supporting structure

Question 19

compound eye

Answer 19

an eye composed of many light detectors

Question 20

antenna

Answer 20

a feeler that is on the head if an invertebrate such as a crustacean or an insect that senses touch taste or smell

Question 21

metamorphosis

Answer 21

process of transformation from an immature form to an adult form in two or more distinct stages

Question 22

endoskeleton

Answer 22

an internal skeleton

Question 23

water vascular system

Answer 23

a system of canals filled with a watery fluid that circulates throughout the body of an echinoderm