AS & A Level Marine Science (9693) — May–June 2023, Paper 23
5 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 the shell of a common dogwhelk, Nucella lapillus, which is adapted to live on rocky shores. State a mineral that is required for the formation of shells.
Answer this question and get it marked →Fig. 2.1 shows apparatus used to investigate the rate of photosynthesis in the laboratory. The apparatus consists of a glass beaker of water containing an aquatic plant, with a…
Answer this question and get it marked →Nitrates are an important source of nitrogen. State the importance of nitrogen for marine organisms.
Answer this question and get it marked →Fig. 4.1 shows a boxer crab with two anemones attached to its front claws. Boxer crabs and anemones show a mutualistic relationship. Explain why this relationship is an example of…
Answer this question and get it marked →pH is an important abiotic factor in marine ecosystems. Describe in terms of ions what the pH of a solution measures.
Answer this question and get it marked →