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Evidence For Evolution (GCSE Biology)

The following is a GCSE Biology test covering 'Evidence For Evolution' from the broader topic Inheritance, Variation And Evolution. The test is geared towards the AQA exam board style syllabus.
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Why do scientists compare homologous structures (e.g. forelimbs of mammals)?
Which factor is most likely to lead to reproductive isolation and eventually speciation?
How does the fossil record limit what we can say about the details of evolutionary history?
Which of the following best describes homologous DNA evidence for evolution?
What does the fossil record show about the sequence of life forms through Earth’s history?
Which statement about natural selection is correct?
Why is observed antibiotic resistance in hospitals strong evidence for evolution by natural selection rather than just individual health changes?
Which process produces new alleles (genetic variation) that natural selection can act upon?
How can antibiotic resistance in bacteria be used as an example of natural selection?
Why are isolated island species often important in studies of evolution?
Which observation would best support the hypothesis that two species share a recent common ancestor?