What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.18.3.1Natural selection with reference• Describe natural selection with reference to: (a) genetic variation within populations (b) production of many offspring (c) struggle for survival, including competition for resources (d) a greater chance of reproduction by individuals that are better adapted to the environment than others (e) these individuals pass on their alleles to the next generationSyllabus objective18.3.2Selective breeding with reference• Describe selective breeding with reference to: (a) selection by humans of individuals with desirable features (b) crossing these individuals to produce the next generation (c) selection of offspring showing the desirable featuresSyllabus objective18.3.3How selective breeding by artificial• Outline how selective breeding by artificial selection is carried out over many generations to improve crop plants and domesticated animals and apply this to given contextsSyllabus objective18.3.4Adaptation as the process, resulting• Describe adaptation as the process, resulting from natural selection, by which populations become more suited to their environment over many generationsSyllabus objective18.3.5Development of strains of antibiotic• Describe the development of strains of antibiotic resistant bacteria as an example of natural selectionSyllabus objective18.3.6Differences between natural• Outline the differences between natural and artificial selectionSyllabus objective