Lab 10: Phylum Chordata

Question 1

Oviparous

Answer 1

Mother lays eggs. Young develop with nutrition inside the egg

Question 2

Viviparous

Answer 2

Young receive nutrition from the inside of the mother, live birth

Question 3

Ovoviviparous

Answer 3

Eggs retained inside the parent, young develop with nutrition inside the egg, live birth

Question 4

Poikilotherm

Answer 4

Body Temperature generally the same as the environment

Question 5

Homeotherm

Answer 5

Body temperature different from the environment

Question 6

Lateral

Answer 6

To the sides of an animal

Question 7

Dorsal

Answer 7

To the back of an animal

Question 8

Ventral

Answer 8

To the belly of an animal

Question 9

Anterior

Answer 9

To the head end of the animal

Question 10

Posterior

Answer 10

To the tail of an animal

Question 11

Cloaca

Answer 11

Common opening for digestive, excretory , and reproductive systems

Question 12

Lampreys

Answer 12

Eel-like fish, with no jaws. Most are parasites

Question 13

Cartilaginous Fish

Answer 13

Sharks, rays, ratfishes. Cloaca present except in ratfish

Question 14

Ray-finned Fish

Answer 14

May provide care for young/ Fish have mineralized skeletons.

Question 15

Lung Fish

Answer 15

Similar to ray-finned fish, mineralized skeletons. Cloaca present.

Question 16

Amphibians

Answer 16

Frogs, toads, salamanders, newts. Generally water and land animals; some are exclusively either. Lays eggs; eggs must be kept wet.

Question 17

Mammals

Answer 17

Named for the mammary glands which provide milk. Typically extensive parental care.

Question 18

Turtles and Tortoises

Answer 18

Terrestrial or aquatic, all lay eggs on land. Cloaca present

Question 19

Lizards and Snakes

Answer 19

Cloaca present. Most snakes have 1 lung; some have 2 but the second is tiny.

Question 20

Crocodilians

Answer 20

Crocodiles, alligators and gavials. Aquatic but breath air. Lay eggs, some parental care is provided.

Question 21

Birds

Answer 21

Many adaptations for flight. Cloaca present. No urinary bladder.