Amphibia

Question 1

Ichthyostega

Answer 1

Early amphibians that are extinct semi-terrestrial tetrapods with an amphibian like body plan

Question 2

Amphibia

Answer 2

Monophyletic group of terrestrial or freshwater tetrapods that are ectotherm

Question 3

Amphibia Skin

Answer 3

Thin, water, and gas permeable that can absorb and lose water directly and contains mucus glands that produce secretions to maintain moisture

Makes them susceptible to salt and desiccation

Question 4

Amphibia Breathing

Answer 4

Use a buccal pump to ventilate lungs

Gills in aquatic larval stages

Three-chambered heart, two atria and one ventricle

Question 5

Amphibia Reproduction

Answer 5

Reproduce in water or moist habitats

Nearly all spawn in water (oviparous)

Eggs lack protective shells and extra embryonic membranes so are prone to desiccation

Question 6

Amphibian life cycle

Answer 6

metamorphosis of aquatic larvae into terrestrial adults and is dependent on water

Question 7

Urodela

Answer 7

Salamanders with tails in the adult stage

Lay eggs in water and have aquatic larvae with variation life cycles

Larvae have external gills

Walk rather than jump

Predators of invertebrates as larvae and adults

Question 8

Paedomophosis

Answer 8

The retention of juvenile features in sexually mature organisms experienced by salamanders

Question 9

Anura

Answer 9

Frogs that transform from tadpoles with tails to adults w/out tails

Lack legs in early larval development but are known for them in adulthood

Well-developed ears

Question 10

Toads

Answer 10

Frogs (Anura) with leathery skin

Question 11

Apoda

Answer 11

Caecilians

Legless amphibians that are mostly burrowers that are viviparous (give birth to live young)

Nearly blind, lack external ear structures

Thickened skull and sharp teethe