invertebrate animals

Question 1

an animal that has a backbone

Answer 1

vertebrates

Question 2

an animal that does not have a backbone

Answer 2

invertebrates

Question 3

an organism that eats other organisms or organic matter

Answer 3

consumer

Question 4

a mass of nerve cells

Answer 4

ganglion

Question 5

the digestive tract

Answer 5

gut

Question 6

a body cavity that contains the internal organs

Answer 6

coelom

Question 7

the 2 sides of its body mirror each other on each side of its body the ant has one eye one antenna and three legs

Answer 7

bilateral symmetry

Question 8

its body is organized around the center like spokes on a wheel

Answer 8

radical symmetry

Question 9

you can not draw a straight line to divide its body into two or more equal parts its body is not organized around a center

Answer 9

asymmetry

Question 10

they are the simplest invertebrates they have no tissues guts or neurons adult sponges move only millimeters a day if they move at all

Answer 10

sponges

Question 11

have complex tissues and a gut for digesting food they have simple network of nerve cells they move more quickly than sponges can if the body cells are separated they can come back together

Answer 11

cnidarians

Question 12

they are divided into 3 major classes planarians and marine flatworms flukes and tapeworms

Answer 12

flatworms

Question 13

have bodies that are long slim and round like spaghetti they have bilateral symmetry they have a simple nervous system

Answer 13

roundworms

Question 14

they fit into 3 classes the gastropods includes slugs ans snails the bivales include clams and other shellfish that have 2 shells cephalopods includes squids and octopuses

Answer 14

mollusks

Question 15

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

Answer 15

open circulatory system

Question 16

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

Answer 16

closed circulatory system

Question 17

they have bilateral symmetry they have closed circulatory system they have complex nervous system with a brain a nerve chord connects the brain to a ganglion in each segment they live in salt water fresh water or on land

Answer 17

annelid worms

Question 18

a hard external supporting structure

Answer 18

exoskeleton

Question 19

an eye composed of many light detectors

Answer 19

compound eye

Question 20

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

Answer 20

antenna

Question 21

a phase in the life cycle of many animals during which a rapid change from the immature form of an organism to the adult form takes place

Answer 21

metamorphosis

Question 22

an internal skeleton made of bone or cartilage

Answer 22

endoskeleton

Question 23

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

Answer 23

water vascular system