2nd Book, Chap 4

Question 1

Homeostasis

Answer 1

Keeping internal body conditions stable

Question 2

Adaptations

Answer 2

Structures and behaviors that allow animals to preform their functions

Question 3

Vertebrate

Answer 3

Animals with backbone

Question 4

Invertebrate

Answer 4

Animals without backbone

Question 5

Tissue

Answer 5

A group of similar cells that preforms a specific function

Question 6

Organ

Answer 6

Made up of different tissues

Question 7

Radial symmetry

Answer 7

A body plan in which any number of imaginary lines that all pass through a central point divide the animal into two mirror images

Question 8

Bilateral symmetry

Answer 8

Only one line of symmetry can be drawn to divide into halves

Question 9

Cnidarians

Answer 9

Invertebrates that have stinging cells and take food into a central body cavity

Question 10

Mollusks

Answer 10

Invertebrates with soft, unsegmented bodies that are often protected by a hard shell

Question 11

Anthropods

Answer 11

Invertebrates that have hard outer coverings, segmented bodies, and pairs of jointed appendages

Question 12

Exoskeleton

Answer 12

Outer skeleton

Question 13

Echinoderm

Answer 13

Invertebrate that has an internal skeleton and a system of fluid-filled tubes

Question 14

Endoskeleton

Answer 14

Internal skeleton

Question 15

Chordate

Answer 15

A cell that has a notochord, nerve cord, and punches in the throat area

Question 16

Notochord

Answer 16

Flexible rod that supports a chordate’s back

Question 17

Vertebrae

Answer 17

Small bones

Question 18

Ectotherm

Answer 18

Animal that produces little internal body heat

Question 19

Endotherm

Answer 19

Animal that controls the internal heat it produces and regulates

Question 20

Fish

Answer 20

A vertebrate that lives in the water and uses fins to move

Question 21

Cartilage

Answer 21

A tissues more flexible than a bone

Question 22

Amphibian

Answer 22

A vertebrate that is ectothermic and spends its early life in the water and its adult life in land

Question 23

Reptile

Answer 23

Ectothermic vertebrate that has scaly skin and lungs and lay eggs on land

Question 24

Bird

Answer 24

An endothermic vertebrate that lay eggs and has feathers and a four-chambered heart

Question 25

Mammals

Answer 25

Endothermic vertebrates that have skin covered with fur or hair, and a four-chambered heart

Question 26

Mammary glands

Answer 26

Milk produced by organs in the mammal mother

Question 27

Monotremes

Answer 27

Lay eggs

Question 28

Marsupials

Answer 28

Born at an early stage of development, and they usually continue to develop in a mother’s pouch

Question 29

Placental mammal

Answer 29

Develops inside its mother’s belly until its body systems can function independently

Question 30

Placenta

Answer 30

An organ the mother and embryo share