The document discusses two chapters related to ethical issues in biomedical science. Chapter 16 discusses cloning of animals and humans, including the cloning of Dolly the sheep and the implications and debates around cloning animals for agricultural purposes versus cloning humans. While cloning animals is possible and can facilitate reproduction of valuable species, cloning humans for reproduction raises significant ethical concerns. Chapter 18 discusses animal experimentation in biomedical research, noting that most experiments involve rats and mice but that suffering of animals is an issue that requires balancing with potential medical benefits. Scientists aim to refine experiments, reduce animal usage, and replace animals where possible.