Chapter 13

Question 1

Phylum Chordata

Answer 1

a phylum of kingdom animalia of animals with a dorsal nerve cord and an internal skeleton

Question 2

Subphylum Vertebrata

Answer 2

a subphylum of phylum chordata of animals with vertebrae forming a backbone

Question 3

Class Agnatha

Answer 3

a class of phylum chordata of jawless fish

Question 4

Cold-Blooded

Answer 4

having a body temperature not internally regulated but approximately that of the environment

Question 5

Class Chondrichthyes

Answer 5

a class of phylum chordata of cartilaginous fish

Question 6

Gills

Answer 6

a feathery organ, full of capillaries, for exchanging gases under water

Question 7

Class Osteichthyes

Answer 7

a class of phylum chordata of bony fish

Question 8

Class Amphibia

Answer 8

a class of phylum chordata of gilled then lunged vertebrates

Question 9

Lungs

Answer 9

a sack-like organ, full of capillaries, for exchanging gases in the air

Question 10

Hibernate

Answer 10

to become dormant in cold weather

Question 11

Estivate

Answer 11

to become dormant in hot weather

Question 12

Class Reptilia

Answer 12

a class of phylum chordata of scaly-skinned animals with lungs

Question 13

Carnivores

Answer 13

a meat eater

Question 14

Insectivores

Answer 14

an insect eater

Question 15

Omnivores

Answer 15

an animal that eats all kinds of food

Question 16

Herbivore

Answer 16

a plant eater

Question 17

Class Aves

Answer 17

a class of phylum chordata of warm-blooded, feathered animals

Question 18

Warm-Blooded

Answer 18

able to maintain a steady body temperature regardless of environmental temperatures

Question 19

Class Mammalia

Answer 19

a class of phylum chordata of warm-blooded animals with mammary glands and hair

Question 20

Uterus

Answer 20

the organ in which mammals live inside their mothers before birth (womb)

Question 21

Placenta

Answer 21

a capillary-rich organ formed by mammalian embryos to allow diffusion of food and wastes to and from the unborn and its mother