Life Stage of Amphibians

What is the first step in the amphibian life cycle according to the diagram?

• The tadpole hatches from the egg.

• The female lays a mass of eggs which are fertilized by the male.

• The tadpole grows front legs and its tail shortens.

• The tail disappears and the amphibian starts to eat insects.

How long does it take for a tadpole to hatch from the egg?

• 2-4 years

• 2-25 days

• After it develops lungs and hind legs

• It does not hatch; it grows directly into an adult

What does a tadpole do after it hatches from the egg?

• It lays eggs.

• It jumps out of water onto land.

• It swims and eats plants, breathing through gills.

• It grows fins and a stronger tail.

What happens to the tadpole after it grows fins and a stronger tail?

• It starts to eat insects instead of plants.

• It lays eggs.

• It grows front legs and its tail shortens.

• It develops lungs and hind legs.

What is the final stage of the amphibian life cycle as shown in the diagram?

• The tadpole grows fins and a stronger tail.

• The female lays eggs.

• The tail disappears and it starts to eat insects instead of plants.

• The tadpole grows front legs and its tail shortens.

Which of the following are also amphibians, as indicated in the image?

• Salamander and Toad

• Salamander and Newt

• Toad and Newt

• Salamander, Toad, and Newt

Tags

NGSS.MS-LS4-2

At what stage does the amphibian begin to breathe air with lungs instead of through gills?

• Immediately after it hatches from the egg

• After it grows fins and a stronger tail

• When it develops front legs and its tail starts to shorten

• Upon reaching full adulthood

What adaptation allows adult amphibians to live both in water and on land?

• Strong tails for swimming

• Ability to lay eggs in water

• Presence of both lungs and gills at different life stages

• Webbed feet for better movement in water

Why do amphibians lay their eggs in water?

• To protect them from predators on land

• Because the eggs require moisture to develop properly

• To ensure the eggs stay warm

• Because the eggs can only hatch in water

How do amphibians typically regulate their body temperature?

• By basking in the sun

• Through internal metabolic processes

• By changing their skin color

• They do not regulate their body temperature