biodiversity definition and examples

📚 Quick Study Guide

• 🌍 Biodiversity refers to the variety of life on Earth at all its levels, from genes to ecosystems, and the ecological and evolutionary processes that sustain it.
• 🧬 It encompasses three main levels: genetic diversity (variation within a species), species diversity (variety of species), and ecosystem diversity (variety of habitats, communities, and ecological processes).
• 🤝 Biodiversity provides essential ecosystem services such as pollination, clean water, climate regulation, and nutrient cycling.
• ⚠️ Threats to biodiversity include habitat loss, climate change, pollution, overexploitation, and invasive species.
• 💡 Conservation efforts are crucial to protect and restore biodiversity for current and future generations.

🧪 Practice Quiz

1. Which of the following best defines biodiversity?
   1. A) The number of individual organisms in an area.
   2. B) The variety of life in the world or in a particular habitat or ecosystem.
   3. C) The total amount of biomass in an ecosystem.
   4. D) The study of different cultures around the world.
2. Which of the following is NOT a level of biodiversity?
   1. A) Genetic diversity
   2. B) Species diversity
   3. C) Ecosystem diversity
   4. D) Planetary diversity
3. Which of the following is an example of genetic diversity?
   1. A) Different breeds of dogs
   2. B) Different species of trees in a forest
   3. C) Different types of ecosystems in a country
   4. D) Different types of soil in a garden
4. What is the importance of biodiversity for humans?
   1. A) Provides essential ecosystem services
   2. B) Is aesthetically pleasing
   3. C) Offers potential for scientific research
   4. D) All of the above
5. Which of these is a major threat to biodiversity?
   1. A) Habitat loss
   2. B) Climate change
   3. C) Pollution
   4. D) All of the above
6. Which of the following helps in the conservation of biodiversity?
   1. A) Deforestation
   2. B) Sustainable agriculture
   3. C) Industrial pollution
   4. D) Overfishing
7. What is an example of ecosystem diversity?
   1. A) Different types of bacteria in the soil
   2. B) The variety of habitats in a national park
   3. C) The different colors of butterflies
   4. D) The number of leaves on a tree