Anuran Reproduction and Metamorphosis

Mating clasp of frogs

Amplexus

Type of fertilization in frogs

External

What jelly layers of eggs do in water

Absorb water and swell

What parents do with most frog eggs

Abandon them

Young that hatch from frog eggs

Tadpoles

Tadpole tail type

Long and finned

Gills of a tadpole

Internal and external

Tadpole legs

None

Tadpole feeding type

Herbivorous

First limbs to appear

Hindlegs

Where forelegs are temporarily hidden

Folds of the operculum

What happens to the tail

Resorbed

Breathing organs that develop in metamorphosis

Lungs

What happens to the gills

Resorbed

Hormone that regulates metamorphosis

Thyroxine

What nourishes the frog embryo

Yolk

First food of a tadpole

Algae

Structure that grows over the external gills

Skinfold

Opening where water exits after the gills are covered

Spiracle

Age when a frog is sexually mature

Three years