Central Idea: Ecosystems & Biodiversity Exercise

Central Idea: Ecosystems & Biodiversity

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Central Idea: Ecosystems & Biodiversity

Identify the central idea in an informational text about ecosystems and biodiversity.

Questions

  1. MultiChoice

    Passage: Tropical rainforests cover less than 10 percent of Earth's surface, yet they contain over half of the world's plant and animal species. They play a crucial role in regulating global climate and producing oxygen. What is the central idea of this passage?

  2. MultiChoice

    Passage: Coral reefs are often called the rainforests of the sea because they shelter a quarter of all ocean species. Additionally, they shield coastal communities from storm surges and erosion. What is the central idea?

  3. MultiChoice

    Passage: While foraging for nectar, bees transfer pollen between flowers. This process enables plants to reproduce, securing the growth of fruits, vegetables, and wild plant life essential to terrestrial ecosystems. What is the central idea?

  4. MultiChoice

    Passage: Wetlands act like giant natural sponges by absorbing heavy rainfall and trapping pollutants. By filtering toxic substances and moderating floods, wetlands safeguard nearby land and water supplies. What is the central idea?

  5. MultiChoice

    Passage: Top predators like wolves and lions prevent herbivores from overgrazing plant communities. Without these predators, plant populations collapse, triggering widespread habitat destruction. What is the central idea?

  6. MultiChoice

    Passage: Organisms like bacteria, fungi, and earthworms feed on dead plants and animals. They break down organic matter into rich soil nutrients, allowing new plant life to thrive. What is the central idea?

  7. MultiChoice

    Passage: Growing in tropical coastal waters, mangrove trees possess specialized roots that trap sediments and absorb wave energy. They reduce shoreline erosion and offer nursery grounds for marine species. What is the central idea?

  8. MultiChoice

    Passage: Non-native species introduced to new habitats frequently lack natural predators. Consequently, they consume local food sources rapidly and displace native species, disrupting food webs. What is the central idea?

  9. MultiChoice

    Passage: Ecosystems with a wide variety of plant and animal species adapt more effectively to disease or climate fluctuations. High species diversity ensures that if one organism declines, others fill its functional role. What is the central idea?

  10. MultiChoice

    Passage: Keystone species, such as sea otters, exert immense influence over their habitats. By keeping sea urchin populations in check, otters prevent kelp forests from being destroyed, supporting hundreds of marine creatures. What is the central idea?

  11. MultiChoice

    Passage: Periodic low-intensity forest fires clear accumulated brush and return essential nutrients to the ground. Certain tree seeds even rely on heat from fires to open and germinate. What is the central idea?

  12. MultiChoice

    Passage: Parks and community gardens in urban areas lower city temperatures, improve air quality, and offer refuges for local wildlife. They also encourage physical exercise for residents. What is the central idea?