CSAT Suneung · Biology I
Ecology and evolution
10 practice questions, each with the answer and an explanation.
Practise Ecology and evolution now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 10 questions
- In an ecosystem, organisms that make their own food by photosynthesis are called
- In a food chain, about what percentage of the energy at one trophic level passes to the next?
- A population of 200 mice lives in 4 hectares of field. What is the population density?
- The carbon cycle returns carbon dioxide to the atmosphere mainly through
- Natural selection acts on
- In a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele q is 0.3. What is the frequency of the homozygous recessive genotype?
- In the Hardy-Weinberg equilibrium with q = 0.3, what is the frequency of heterozygotes?
- Which evidence supports the idea that humans and chimpanzees share a common ancestor?
- Which of the following best describes a niche?
- Which relationship benefits both species?
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