AS & A Level Marine Science (9693) — May–June 2024, Paper 21

5 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.

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Question 1 · 19 marks · Investigative skills

Zooplankton is composed of a variety of organisms, including copepods. Fig. 1.1 shows a copepod found in zooplankton. Make a large drawing of the copepod in Fig. 1.1. Do not…

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Question 2 · 11 marks · Marine ecosystems

A student investigated photosynthesis in three species of macroalga, P, Q and R. All three species can be found in the littoral zone of a rocky shore. Define the term littoral…

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Question 3 · 13 marks · Investigative skills

Damselfish and wrasse are two types of small predatory fish found on tropical coral reefs, feeding on a variety of prey. Research was carried out to establish if either damselfish…

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Question 4 · 15 marks · Investigative skills

Lugworms are a species of worm found on sandy and muddy shores. Each lugworm lives in a single burrow where it consumes sediment, digesting any food sources within the sediment.…

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Question 5 · 17 marks · Water and the physical attributes of seawater

Magnesium sulfate and sodium chloride are examples of solutes. Define the term solute.

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