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Now, on the island of Kauai, there are no longer crickets with ridges that chirp; they are all crickets without ridges that are silent.

A. True
B. False

Answer :

Final answer:

The statement is false; though crickets on Kauai have evolved to be silent due to predation, it's unlikely that all chirping crickets have been replaced. Crickets create sound by stridulation and can amplify their calls using the environment.

Explanation:

The statement that on the island of Kauai there are no longer any crickets with ridges who chirp is false. While it is true that a population of crickets on Kauai evolved to become silent due to pressure from predation by a parasitic fly that located crickets by their chirping, it's highly improbable that all chirping crickets have been replaced by silent ones. This evolutionary change allows crickets without ridges on their wings, which are responsible for the chirping sound, to avoid detection and achieve greater survival rates. However, this doesn't mean that crickets with ridges have been entirely eliminated from the population; there might still be areas where the selective pressure is not as strong, allowing chirping crickets to survive.

Insects and some crustaceans create sounds through a process called stridulation, which is rubbing body parts together. Although most of these sounds are not as loud as those made by cicadas, some crickets amplify their calls using leaf structures or tunnels in the ground. The adaptability of crickets on Kauai has been a remarkable case study in rapid evolution and species distribution affected by environmental pressures.

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