Vertebrates Tets & Amphibs

Question 1

Tetrapod meaning

Answer 1

Four-footed

Includes amphibians, reptiles, birds, and mammals

Question 2

Tetrapod habitat

Answer 2

Mainly freshwater
Use modified fleshy fins
Occasionally inhabit land for short periods

Question 3

Ancestral tetrapod habitat

Answer 3

Aquatic as juveniles and terrestrial as adults

Question 4

What is the distinguishing factor of a tetrapod?

Answer 4

Presence of a lateral line

Question 5

Tetrapod general features

Answer 5

Limbs/pelvis/pectoral girdle: More ossified, fusion of bones

Vertebral column: Larger articulations to avoid sagging

Modern amphibians represent intermediate if transition from water to land

Question 6

Modern amphibians arose from (1)

Answer 6

Labyrinthodonts

Question 7

Acanthostega

Answer 7

“4 footed fish”
Radial fin rays supporting a tail fin
Limbs had 8 digits
Internal gills

Question 8

Orders of Amphibians (3)

Answer 8

1) Anura
2) Urodela/Caudata
3) Gymnophiona/Apoda

Question 9

Examples of Anura

Answer 9

Frogs

Toads

Question 10

Examples of Urodel/Caudata

Answer 10

Salamaders

Newts

Question 11

Examples of Gymnophiona/Apoda

Answer 11

Caecilians

Question 12

Salamander development

Answer 12

Eggs laid in water, metamorphose on land

1) lose lateral line system
2) lungs replace gills
3) develop legs