AP Biology · Free-response questions 2018

8 questions, each with its course unit and the official scoring guidelines.

Official paper (PDF) · QuestionsAll AP Bio papers→

Question 1

Open answer
Question 1 — Figure 1. Phylogenetic tree representing the evolutionary relatedness among bear populations based on mitochondrial D N A sequence comparisons 1. Polar bears are highly adapted for life in cold climates around the North…

Source: College Board — AP Biology, Free-response questions, 2018

Question 3

Open answer
Question 3 — 3. Seagrasses are aquatic plants that reproduce sexually. Male seagrass flowers produce sticky pollen that is carried by circulating water to female flowers, resulting in fertilization. A researcher claims that mobile…

Source: College Board — AP Biology, Free-response questions, 2018

Question 4

Open answer
Question 4 — Figure 1. Percent survival of five strains of bedbugs treated with beta- cyfluthrin. Aplus symbolindicates the gene is present; a minus symbol indicates the gene is deleted. Error bars represent the 95% confidence…

Source: College Board — AP Biology, Free-response questions, 2018

Question 5

Open answer
Question 5 — Figure 1. Probability of nest success in an environment with predators 5. Some birds, including great spotted cuckoos, lay their eggs in the nests of other birds, such as reed warblers. The warbler parents raise the…

Source: College Board — AP Biology, Free-response questions, 2018

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Question 7

Open answer
Question 7 — 7. In the tongue sole fish (Cynoglossus semilaevis), sex is determined by a combination of genetics and environmental temperature. Genetically male fish have two Z chromosomes Z Z , and genetically female fish have one…

Source: College Board — AP Biology, Free-response questions, 2018

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