An eagle has a hooked beak which helps it ingest food. What is this an example of?

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13. An eagle has a hooked beak which helps it ingest food. What is this an example of?

A hooked beak is a specialized physical feature that helps the eagle survive and feed in its environment. This is a characteristic that has evolved over time to suit its specific lifestyle. This is an example of an adaptation.

The correct option is $\boxed{\text{A}}$.

14. Which is the correct order for organisms in a food chain?

A food chain always begins with a producer, which makes its own food. Producers are eaten by herbivores (primary consumers), and herbivores are then eaten by carnivores (secondary consumers).

The correct order is producer $\rightarrow$ herbivore $\rightarrow$ carnivore.

The correct option is $\boxed{\text{D}}$.

15. Which term correctly describes the way in which energy is transferred between organisms in a food chain?

Energy is transferred from one organism to another in a food chain when one organism consumes another. The act of taking food into the body is called ingestion.

The correct option is $\boxed{\text{B}}$.

16. Which row correctly indicates the factor(s) that could cause a population of animals to decrease?

• Predation: An increase in predators or predation rate will lead to more animals being eaten, causing the prey population to decrease.
• Disease: The spread of disease can increase mortality rates within a population, leading to a decrease in its size.

Both predation and disease are factors that can cause a population of animals to decrease.

The correct option is $\boxed{\text{A}}$.