Amphibia

Question 1

Major characteristic of class amphibia

Answer 1

1. Tetrapods
2. Ectothermic
3. Heart with sinus venous
4. Moist glandular skin with cutaneous respiration
5. External gills on larval forms
6. Eggs with jellylike covering
7. Stapes (columella) with dorsolateral orientation
8. Short straight ribs
9. Pedicellate teeth
10. Green rods
11. Levator bulbi muscle
12. Forced pump respiration (positive pressure)

Question 2

Order gymnophiona characteristics

Answer 2

1. Limbless
2. Paired tentacles
3. Annular rings
4. Dual jaw closure

Question 3

Order urodela characteristics

Answer 3

1. Heterochrony - paedomorphosis
2. Courtship dances

Question 4

Order anura characteristics

Answer 4

1. Loss of tails
2. Anterior tongue attachment
3. Skeletal modifications for jumping

Question 5

What skeletal modifications does Order Anura have for jumping

Answer 5

1. Ilium directed anteriorly
2. Sacral vertebra with lateral projections (diapophyses)
3. Urostyle
4. Fusion of limb bones - ridoulna and tibiofibular
5. Elongation of tarsals and phalanges

Question 6

What is chytridomycosis and how is it affecting frogs?

Answer 6

A fungal disease that infects the skin of frogs causing the skin to thicken and prohibit has exchange

Question 7

What type of locomotion does gymnophionans have

Answer 7

Fossorial

Question 8

What type of locomotion does anura have

Answer 8

Saltatorial (jumping)