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Environmental Biology MCQs

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1. : The scientific study of the relationship between living organisms and their environment is called?





2. : Which of the following is the ultimate source of energy for most ecosystems?





3. : The process by which plants convert carbon dioxide and water into food is?





4. : Which organisms are known as producers?





5. : Which organisms are responsible for fixing atmospheric nitrogen?





6. : The relationship between a tick and a dog is an example of?





7. : Which organisms are considered decomposers?





8. : Which of the following is an abiotic factor?





9. : The term biodiversity refers to?





10. : Which is the largest biome on Earth?





11. : Which plant tissue is responsible for water transport?





12. : Which gas is released by plants during respiration?





13. : Which biome has the greatest biodiversity?





14. : Which organisms are considered primary consumers in an ecosystem?





15. : Which plant pigment absorbs sunlight for photosynthesis?





16. : Which cycle describes the movement of water on Earth?





17. : Which organisms are at the top of the food chain?





18. : The interaction between algae and fungi in lichens is an example of?





19. : Which of the following ecosystems is the most productive?





20. : Which gas is essential for respiration in animals?





21. : The process of losing water vapor from leaves is called?





22. : The uppermost fertile layer of soil that supports plant growth is called?





23. : Which of the following is an invasive species?





24. : Which group of organisms produces antibiotics naturally?





25. : Which process in plants maintains the balance of oxygen in the atmosphere?





26. : Which organisms recycle nutrients back into the ecosystem?





27. : Which biome is known for permafrost?





28. : Which is the process by which green plants prepare their own food?





29. : Which organisms are responsible for breaking down cellulose in herbivores?





30. : Which is the largest reservoir of carbon on Earth?





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