19.5. Conservation
A subsection of Biology, 5090, through 19. Relationships of organisms with one another and with the environment
Listing 7 of 7 questions
Fish are an important part of the balanced diet of many people, and fishing is a major source of employment in some countries. Many people therefore believe that fish should be treated as a sustainable resource. Describe what is meant by the term sustainable resource. The government of a country decided to set fishing quotas for herring fish between 2012 and 2020. shows the maximum number of tonnes of herring that the quota allowed to be caught each year. 5 000 10 000 15 000 20 000 herring quota / tonnes 25 000 30 000 35 000 2013 2014 2015 2016 year 2017 2018 2019 2020 Using the information from , describe the trend in quota size and suggest explanations for this trend. Setting fishing quotas is one method used when trying to conserve fish stocks. Explain how two other named methods can be used to conserve fish stocks. name of method explanation name of method explanation Fish are a good source of lipids in the form of fish oil. A student investigated the digestion of fish oil in the laboratory. The student set up the two experiments shown in . pH meter 8.0 fish oil + bile solution pH meter 8.0 fish oil + bile solution + lipase solution experiment test-tube contents The student recorded the pH of the contents of each test‑tube using a digital pH meter at the start of each experiment. Both meters recorded a pH of 8.0. The student continued to monitor the readings on the pH meters for 30 minutes. Use your knowledge of how lipids are digested to explain what you would expect to happen in each test‑tube. experiment 1 experiment 2
5090_w24_qp_22
THEORY
2024
Paper 2, Variant 2
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