Chordata

Question 1

Invertebrate chordates that look a bit like fish, but do not have fins

Answer 1

Lancelets

Question 2

A membrane which serves as a transparent eyelid in frogs

Answer 2

Nictitating Membrane

Question 3

Fishes whose eggs develop and hatch within the mother’s body leading to a “live” birth

Answer 3

Ovoviviearous

Question 4

An additional respiratory organ in amphibians- it must be kept moist to do its job

Answer 4

Skin

Question 5

The class of vertebrates which includes birds

Answer 5

Aves

Question 6

This substance covers the outer surface of most mammals

Answer 6

Hair

Question 7

A membrane involved in a frog’s sense of hearing

Answer 7

Tempanic

Question 8

A structure, found in many organisms, through which digestive wastes, urine and gametes leave the body

Answer 8

Cloaca

Question 9

Structures present in adult amphibians for respiration

Answer 9

Lungs

Question 10

Fish which have thin fins are called __________

Answer 10

Ray-finned

Question 11

The jawless fish which produces copious amounts of slime

Answer 11

Hagfish

Question 12

Glands which produce milk

Answer 12

Mammary glands (titties)

Question 13

Structures which aid in flight and provide insulation in birds

Answer 13

Feathers

Question 14

Individual segments which together make up the backbone

Answer 14

Vertebrae

Question 15

The number of chambers in an amphibian heart

Answer 15

Three

Question 16

Terrestrial organisms are believed to have evolved from a __________- finned fish ancestor

Answer 16

Lobe-finned

Question 17

The evolution of these structures in fish was a major advancement in their ability to feed

Answer 17

Jaws

Question 18

The parasitic jawless fish which sucks the body fluids out of its host

Answer 18

Lampreys

Question 19

The class of organisms that are aquatic as larvae and terrestrial as adults

Answer 19

Amphibia

Question 20

Class of vertebrates which have dry, scaly skin, lungs, and terrestrial eggs

Answer 20

Reptilia

Question 21

Class which includes the sharks, skates and rays

Answer 21

Chonodrichthyes

Question 22

The hollow nerve cord in chordates located near the ________ surface of the body

Answer 22

Dorsal

Question 23

Substance found beneath the skin in mammals which conserves body heat and provides a storage form of energy

Answer 23

Subcutaneous Fat

Question 24

A type of egg which can develop in a terrestrial environment without drying out

Answer 24

Amniotic

Question 25

Fishes whose young develop inside the mother without the presence of an egg

Answer 25

Viviparous

Question 26

A supporting rod running through the body at some point in the life span of chordates

Answer 26

Notochord

Question 27

The number of chambers in a bird’s heart

Answer 27

Four

Question 28

The class which includes the jawless fishes

Answer 28

Agnatha

Question 29

The class which includes fish like perch, salmon, and tuna

Answer 29

Osteichthyes

Question 30

Structures used by fish for respiration

Answer 30

Gills

Question 31

At some point in their lives __________ pouches, found near the throat region, are present in all chordates

Answer 31

Pharyngeal

Question 32

Organisms whose body temperature depends on the surrounding environment

Answer 32

Ectotherms

Question 33

Chordates are characterized by a ______ which extends beyond the anus for at least part of their lives

Answer 33

A tail

Question 34

Filter-feeding, invertebrate chordates

Answer 34

Tunicates

Question 35

Large, piercing teeth found on the roof of the frog’s mouth

Answer 35

Vomerine (teeth)

Question 36

The substance that makes up the skeleton of sharks and rays

Answer 36

Cartilage

Question 37

Structures covering the outer surface of a fish

Answer 37

Scales

Question 38

Organisms whose body temperature is regulated internally

Answer 38

Endotherms

Question 39

Unidirectional respiration is found in these organisms

Answer 39

Birds

Question 40

The number of chambers found in the heart of a fish

Answer 40

Two