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SingaporeCombined ScienceQuick questions
Biology: Genetics and Ecology
Quick questions on Ecology, food chains and the carbon cycle explained: O-Level Combined Science
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are food webs?Show answer
In a real habitat, many food chains overlap because most animals eat more than one type of food. A food web shows these interconnected chains and gives a fuller picture of feeding relationships in an ecosystem.
What is the carbon cycle?Show answer
Carbon is recycled between the air, living things and fuels:
What is q1?Show answer
In the food chain lettuce to slug to hedgehog, name the producer and the primary consumer. [2 marks]
What is q2?Show answer
Explain why only a small amount of energy passes from one trophic level to the next. [2 marks]
What is q3?Show answer
Name the process that removes carbon dioxide from the atmosphere and two processes that return it. [2 marks]
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