Cold-blooded vertebrate

Question 1

Vertebrate

Answer 1

an animal that has a backbone.

Question 2

Endotherms

Answer 2

an animal that can use body heat from chemical reactions in the body’s cells to maintain a constant body temperature.

Question 3

Ectotherms

Answer 3

an organism that needs sources of heat outside of itself.

Question 4

Lateral line

Answer 4

a faint line visible on both sides of a fish’s body that runs the length of the body and marks the location of sense organs that detect vibrations in the water.

Question 5

Gills

Answer 5

a respiratory organ in which oxygen from the water is exchanged with carbon dioxide from the blood.

Question 6

Jawless fishes

Answer 6

Heterostraci; arandaspididae.

Question 7

Cartilaginous fish

Answer 7

shark, batiods, and stingray .

Question 8

Bony fish

Answer 8

catfish, lungfish, eel.

Question 9

Swim bladder

Answer 9

in bony fishes, a gas-filled sac that is used to control buoyancy; also known as a gas bladder.

Question 10

Amphibians

Answer 10

are animals that can live in water and have lungs and legs.

Question 11

Tadpole

Answer 11

the aquatic, fish-shaped larva of a frog or toad.

Question 12

Metamorphosis

Answer 12

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 13

Caecilians

Answer 13

these amphibians live in tropical areas of Asia, Africa, and South America. They look like earthworms or snakes, but they have the thin, moist skin of amphibians. caecilians do not have legs and unlike other amphibians, some caecilians have bony scales in their skin.

Question 14

Salamander

Answer 14

as adults, most salamanders live under stones and logs in the woods of North America. Salamanders are the most like prehistoric amphibians in overall form. Most of them do lose gills and grow lungs during their development. Some salamanders do not lose their gills and spend their whole life in water.

Question 15

Frogs

Answer 15

they live all over the world, except for very cold places. They are found in rain forests and deserts. They are highly adapted for life on land. Adults have strong legs muscles for jumping, well-developed ears for hearing, vocal cords for calling, and a long sticky tongue.

Question 16

Toads

Answer 16

they live all over the world, except for very cold places. They are found in rain forests and deserts. They highly adapted to live on land. Adults have strong leg muscles for jumping, well-developed ears for hearing, vocal cords for calling, and a long sticky tongue.

Question 17

Reptiles

Answer 17

about 35 million years after amphibians moved onto land, some of them began to change. They grew thick, dry skin that reduced water loss. Their legs changed and grew stronger, so they could walk easily. They also laid eggs that did not dry out on land. They had become reptiles, the first animals to live out of water.

Question 18

Amniotic egg

Answer 18

a type of egg that is surrounded by a membrane, the amnion, and that in reptiles, birds, and egg-laying mammals contains a large amount of yolk and is surrounded by a shell.

Question 19

Turtles

Answer 19

are distantly related to other living reptiles. Generally, tortoises live on land, and turtles spend all, or much of their lives in the water.

Question 20

Tortoises

Answer 20

are distantly related to other living reptiles. Generally, tortoises live on land, and turtles spend all, or much of their lives in the water.

Question 21

Crocodiles

Answer 21

they spend most of their time in the water. Their eyes and nostrils are on top of their flat head so they can watch their surroundings while most of their body is hidden underwater. Hiding in this way gives them a great advantage over their prey. They have a narrow head and pointed snout.

Question 22

Alligators

Answer 22

they spend most of their time in the water. Their eyes and nostrils are on top of their flat head so they can watch their surroundings while most of their body id hidden underwater. Hiding in this way gives them a great advantage over their prey. They have a broad head and rounded snout.

Question 23

Snakes

Answer 23

today, snakes are the most common reptiles, Snakes are carnivores. They have special organs in the mouth that help them smell prey.

Question 24

Lizards

Answer 24

today, lizards are the most common reptiles. Most lizards eat small insects and worms, but some lizards eat plants. Lizards have a loosely connected lower jaw, but they do not swallow large prey whole.

Question 25

Tuataras

Answer 25

live on only a few islands off the coast of New Zealand.

Question 26

Lungs

Answer 26

a respiratory organ in which oxygen from the air is exchanged with carbon dioxide from the blood.