Invertebrate Animals

Question 1

Embryo

Answer 1

A plant or animal at an early stage of development.

Question 2

Consumer

Answer 2

An organism that eats other organisms or organic matter.

Question 3

Innate Behavior

Answer 3

An inherited behavior that does not depend on the environment or experience.

Question 4

Learned Behavior

Answer 4

A behavior that has been learned from experience.

Question 5

Territory

Answer 5

An area that is occupied by one animal or a group of animals that do not allow other members of the species to enter.

Question 6

Hibernation

Answer 6

A period of inactivity and lowered body temperature that some animals undergo in winter as a protection against cold weather and lack of food.

Question 7

Estivation

Answer 7

A period of inactivity and lowered body temperature that some animals undergo in summer as a protection against hot weather and lack of food.

Question 8

Circadain Rhythm

Answer 8

A biological daily cycle.

Question 9

Social Behavior

Answer 9

The interaction between two animals of the same species.

Question 10

Communication

Answer 10

A transfer of a signal or message from one animal to another that results in some type of response.

Question 11

Pheromone

Answer 11

A substance that is released by the body and that causes another individual of the same species to react in a predictable way.

Question 12

Invertebrate

Answer 12

An animal that does not have a backbone.

Question 13

Ganglion

Answer 13

A mass of nerve cells .

Question 14

Gut

Answer 14

The digestive tract.

Question 15

Coelom

Answer 15

A body cavity that contains the internal organs.

Question 16

Open Circulatory System

Answer 16

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

Question 17

Closed Circulatory System

Answer 17

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

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 of an invertebrate, such as a crustacean or an insect, the senses touch, taste or smell.

Question 21

Metamorphosis

Answer 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.

Question 22

Endoskeleton

Answer 22

An internal skeleton made of bones and cartilage.

Question 23

Water Vascular System

Answer 23

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