Autotrophs And Heterotrophs In The Ecosystem

The lecture explains the differences between autotrophs and heterotrophs. Autotrophs, derived from Greek words meaning 'self-feeding', produce their own food from simple substances and are known as producers. Heterotrophs, meaning 'other-feeding', rely on autotrophs for nourishment and are called consumers. In a food chain, autotrophs occupy the first trophic level, while heterotrophs follow. Examples of autotrophs include plants, algae, and some bacteria, whereas most animals, fungi, and some bacteria are heterotrophs.

What does the prefix 'auto' in 'autotroph' signify?

• Dependent

• Feeding

• Other

• Self

Which of the following best describes autotrophs?

• They consume autotrophs.

• They are always animals.

• They produce their own food from simple substances.

• They rely on other organisms for food.

Why are autotrophs referred to as producers?

• They depend on heterotrophs for nourishment.

• They are always at the top of the food chain.

• They produce food required by other organisms.

• They consume other organisms.

What does the prefix 'hetero' in 'heterotroph' mean?

• Self

• Feeding

• Other

• Producer

Which statement is true about heterotrophs?

• They make their own food.

• They are producers in the ecosystem.

• They depend on autotrophs for food.

• They are always plants.

In a food chain, where do autotrophs typically appear?

• At the second trophic level

• At the first trophic level

• At the last trophic level

• At the top trophic level

Which of the following is an example of a heterotroph?

• Algae

• Plants

• Cyanobacteria

• Fungi