Amphibians

Question 1

Amphibians

Answer 1

-includes the first tetrapods
-evolution of the first teeth
-carnivores
-6000 species
-freshwater and terrestrial (dependent on water)
-smooth, moist skin (no scales, glands)
-have 2 life stages:
1)larvae (gills, 2-chambered heart, herbivorous, most undergo metamorphosis)
2)adults (lungs, 3-chambered heart, carnivores)

Question 2

Amphibian diversity

Answer 2

-salamanders (urodela)
>some have internal fertilization, some never leave water

Question 3

Frogs and toads (anura)

Answer 3

-has the most species
-typically have loud courtship calls to females
-aggressive bullfrogs eating a bobber, fight for territory

Question 4

Caecillians

Answer 4

-have lost appendages/limbs
-internal fertilization

Question 5

Parental investment strategies

Answer 5

2 extreme strategies
>produce billions of offspring, provide no care, hope some will survive
>produce 1 offspring, care for it until maturity
-most amphibians provide little care to their offsprings