Vertebrate Diversity

Question 1

Class Agnatha:

Answer 1

Jawless fish (lamprey), jawless suction cup mouth, slimy body covering covered with mucus glands respiratory system gills, cartilage no vertebral column unpaired median caudal fin, 2 heart Chambers external fertilisation ectotherm metamorphosis

Question 2

Class Chondrichthyes:

Answer 2

Cartilaginous fish, jaws with teeth teeth not fused to jaws and shed throughout life, little teeth in skin gives sandpaper feel, gills, cartilage,paired fins, muscular tail 2 heart Chambers internal fertilisation ectotherm no metamorphosis, shark

Question 3

Class Osteichthyes:

Answer 3

Bony fish, jaws with teeth, scales gills, bones, paired fins, muscular tail, 2 heart chambers mainly external internal fertilisation rare, ectotherm metamorphosis salmon.

Question 4

Class Amphibia:

Answer 4

Amphibians jaws often protrusible tongue simple tongue body covering is smooth and mois, gills as larvae lungs and skin as adults bone and cartilage two pairs walking limbs tails as larvae three heart Chambers external in freshwater reproduction ectotherm metamorphosis frog

Question 5

Class Reptilia:

Answer 5

Reptiles jaws simple teeth scales lungs bone and cartilage two pairs walking legs three heart chambers four in crocodiles internal fertilisation, ectotherm no metamorphosis, snake

Question 6

Class Aves:

Answer 6

Birds beak of keratin feathers lungs with accessory air sacs, bones many hollow for weight reduction one pair wings one pair legs four heart Chambers internal fertilisation endotherm no metamorphosis honeyeater

Question 7

Class Mammalia:

Answer 7

Mammals jaws with complex teeth, hair, lungs and muscular diaphragm, bone and cartilage two pairs walking legs four heart Chambers internal fertilisation endotherm no metamorphosis, kangaroo