Amphibians

Question 1

What is the fossil evidence of the transition onto land?

Answer 1

Eusthenopteron, Panderichthys and Acanthostega

Question 2

What organism had fish and tetrapod characteristics?

Answer 2

Tiktaalik

Question 3

What was the earliest known tetrapod?

Answer 3

Acanthostega

Question 4

Phylogenic tree?

Answer 4

Limbs with digits (partition): Acanthostega=Tulerpeton=Amphibians and Amniotes

Question 5

Name some threats for amphibians

Answer 5

Chytrid fungus, introduced frogs and human interactions

Question 6

Name a few derived characters

Answer 6

Four limbs, pentadactyl limbs, loss of pharyngeal slits

Question 7

Double or single circulation?

Answer 7

Double

Question 8

Name the orders within class amphibia

Answer 8

Urodela, Anura and Apoda

Question 9

Describe gas exchange

Answer 9

Breathe through the skin and also use buccal pump

Question 10

Describe the heart

Answer 10

Three chambered, 2 Atria and 1 ventricle

Question 11

What is the parental care like?

Answer 11

80% lack this, some do: Surinam frog