vertebrate

Front

An aquatic animal with gills, fins, and a cartilaginous skeleton instead of bones. Which group does it belong to?

Back

Cartilaginous fish

Front

A frog breathes through lungs while on land, but in water, it can also use:

Back

skin

Front

Reptiles were the first vertebrates to completely adapt to life on land. Which feature best supports this adaptation?

Back

Laying shelled, waterproof eggs

Front

Birds have hollow bones. What is the main advantage of this feature?

Back

The main advantage is reduced body weight for easy flight.

Front

Kangaroos carry their babies in a pouch until they grow bigger. Such mammals are called:

Back

Marsupials

Answer explanation

Kangaroos give birth to babies when they are still very tiny and not fully developed. These babies cannot survive on their own, so the mother keeps them in a special pouch on her belly. Inside the pouch, the baby attaches to the mother’s teat and continues to grow safely until it is strong enough to come out.

Front

If a fish is moved from freshwater to saltwater suddenly, it may die. Why?

Back

The fish cannot regulate its internal salt and water balance.

Front

Why do most amphibians lay their eggs in water?

Back

To ensure the eggs remain moist and to provide a suitable environment for larval development.

Front

A lizard is sunbathing on a rock to warm itself. This shows that reptiles are:

Back

Ectothermic animals that rely on external heat sources.

Front

Crocodiles are more closely related to which group of animals? Options: Lizards, Birds, Turtles, Frogs

Back

Birds

Front

Bats can fly and whales live in water. What does this tell us about mammals?

Back

Mammals are adaptable and can thrive in various environments.