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6 exam-style questions with model answers, plus 8 quick multi-choice questions — every question on the site for this standard, grouped by the 2 pages of notes they come from.
Write a full answer before you reveal the model one — that comparison is where the marks come from. Every block links back to the notes that teach it.
Describe the process of selective breeding, and describe how a plant is cloned by tissue culture.
Explain how selective breeding changes a population over generations, and explain why it creates a trade-off between improved performance and the population's ability to respond to new challenges.
Compare selective breeding with whole organism cloning as methods of propagating a desirable genotype, and evaluate the biological consequences of each.
Describe the steps involved in transferring a gene from one species to another, and describe what is meant by modifying the expression of an existing gene.
Explain how insect resistance evolves in a pest population exposed to an insect-resistant transgenic crop, and explain why planting refuges of non-modified plants slows this.
The four manipulations in this standard differ greatly in speed and precision. Discuss how this trend relates to their biological implications, and evaluate whether greater precision reduces biological risk.