animals

Question 1

a plant or animal at an early stage of development

Answer 1

embryo

Question 2

an organism that eats other organisms or organic matter

Answer 2

consumer

Question 3

an inherited behavior that does not depend on the environment or experience

Answer 3

innate behavior

Question 4

a behavior that has been learned from experience

Answer 4

learned behavior

Question 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

Answer 5

territory

Question 6

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

Answer 6

hibernation

Question 7

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

Answer 7

estivation

Question 8

a biological daily cycle

Answer 8

circadian rhythm

Question 9

the interaction between animals of the same species

Answer 9

social behavior

Question 10

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

Answer 10

communication

Question 11

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

Answer 11

pheromone

Question 12

an animal that does not have a backbone

Answer 12

invertebrate

Question 13

ganglion

Answer 13

a mass of nerve cells

Question 14

the digestive tract

Answer 14

gut

Question 15

a body cavity that contains the internal organs

Answer 15

coelom

Question 16

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

Answer 16

open circulatory system

Question 17

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

Answer 17

closed circulatory system

Question 18

any part of a larger structure such as the body of an organism that is set off by natural or arbitrary boundaries

Answer 18

segment

Question 19

a hard external supporting structure

Answer 19

exoskeleton

Question 20

an eye composed of many light detectors

Answer 20

compound eye

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 a watery fluid that circulates throughout the body of an echinoderm

Answer 23

water vascular system