Koalas and Eucalyptus: A Unique Relationship

Koalas have poor eyesight but excellent senses of smell and hearing, which help them select the least toxic eucalyptus species and detect predators. They exclusively eat eucalyptus leaves, which are toxic to most animals, but koalas have adapted stomachs to digest them. Their diet is low in nutrients and calories, leading to a sedentary lifestyle with up to 20 hours of sleep daily. Despite over 700 eucalyptus species in Australia, koalas feed on only 50, choosing the most nutritious and least toxic leaves. This selectivity poses challenges for conservation programs in captivity.

What advantage do koalas gain from their developed sense of hearing?

• It improves their communication.

• It allows them to detect predators.

• It enhances their vision.

• It helps them find food.

Why are koalas able to eat eucalyptus leaves that are toxic to most animals?

• They only eat the bark of the eucalyptus tree.

• They have a special enzyme in their saliva.

• They are immune to all plant toxins.

• They have adapted stomachs that can digest the leaves.

How much eucalyptus leaves can a koala consume in a day?

• Five pounds

• Less than a pound

• About one pound

• Over two pounds

Why do koalas sleep for up to 20 hours a day?

• Because they are nocturnal

• To conserve energy due to their low-calorie diet

• To digest their food properly

• To avoid predators

How many species of eucalyptus do koalas use for feeding?

• About 100 species

• None, they eat other plants

• All 700 species

• Only 50 species

What makes it difficult for conservation programs to feed koalas in captivity?

• Koalas need a special diet of fruits and vegetables.

• Koalas refuse to eat in captivity.

• Koalas are picky and only eat certain eucalyptus leaves.

• Koalas eat too much.

What is the main reason koalas are selective about the eucalyptus leaves they eat?

• They prefer leaves with a specific texture.

• They choose leaves based on color.

• They select the most nutritious and least toxic leaves.

• They eat only the leaves from the tallest trees.