AS & A Level Marine Science (9693) — May–June 2023, Paper 41
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 shows a diagram of a cell from the leaf of a species of seagrass. Structures A, B and C are labelled. Give the names of the structures labelled A and B.
Answer this question and get it marked →Fig. 2.1 shows an electron micrograph of a chloroplast. On Fig. 2.1, label the part of the chloroplast where the light-independent stage occurs with the letter X and a label line.
Answer this question and get it marked →Fig. 3.1 shows tubeworms, Riftia, near a hydrothermal vent. Riftia contains bacteria called Endoriftia. Describe the relationship between Riftia and Endoriftia.
Answer this question and get it marked →Aquaculture is used to produce large quantities of seafood. Describe how salmon are grown to maturity in sea cages, using extensive aquaculture.
Answer this question and get it marked →Describe how microplastics are formed.
Answer this question and get it marked →Oysters have a complex life cycle with a larval stage and an adult stage. The larvae live in the open water until they settle on a substrate and mature into adults. It has been…
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