Biology Regents Practice Exam

Which type of environment can result in low biodiversity?

1. Sandy beaches

2. Rainforests

3. Deserts

4. Coral reefs

The correct answer is: Deserts

The correct answer is deserts. Deserts typically have extreme environments characterized by limited water availability and harsh temperatures, leading to lower plant and animal diversity compared to other ecosystems. In deserts, adaptations to survive with minimal water and extreme heat or cold are essential, which results in a smaller variety of species that can thrive under such conditions. In contrast, rainforests boast high biodiversity due to their warm climate and abundant rainfall, providing numerous niches for a wide array of species. Coral reefs also support a high diversity of life, offering complex habitats that foster various marine organisms. Sandy beaches can see a moderate level of biodiversity, but typically not as rich as that found in rainforests or coral reefs. Thus, the challenging conditions in deserts contribute to their status as an environment with low biodiversity.