第 1 题
1 分Which of these is a cause of variation in a population that is purely due to environmental factors?
AQA GCSE · Biology 8461
Variation and evolution：练习题
5 道选择题即时批改，另有 2 道文字题附完整解题步骤，全部围绕「Variation and evolution」。
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第 2 题
1 分Variation in a population can lead to the formation of new species. What are the three primary causes of variation in individuals?
第 3 题
1 分Which statement best explains why Charles Darwin's theory of evolution was only gradually accepted by the scientific community?
第 4 题
1 分What is a major risk associated with selective breeding in plants and animals?
第 5 题
1 分In genetic engineering, what is the specific role of a vector?
第 6 题
3 分Explain how a mutation can lead to a relatively rapid change in a species if a significant environmental change occurs.
先自己写一遍答案，再对照解题步骤。
第 7 题
7 分Antibiotic resistance in bacteria is a significant concern for modern medicine and provides clear evidence for the process of evolution.
a) Describe how a population of bacteria can develop resistance to a specific antibiotic through the process of natural selection.
b) Explain why the rapid rate of reproduction in bacteria (binary fission) makes it easier for scientists to observe their evolution compared to multicellular organisms like humans.
c) List three measures that can be taken to reduce the rate of development of new antibiotic-resistant strains of bacteria.
先自己写一遍答案，再对照解题步骤。
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