0610_w21_qp_23
A paper of Biology, 0610
Questions:
40
Year:
2021
Paper:
2
Variant:
3
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35
A species of insect usually has pale-coloured wings. This helps to camouflage them on pale-coloured tree trunks. A few of the insects in this species have darker coloured wings. After a number of years the tree trunks become darker in colour due to environmental changes. The insects with dark-coloured wings become more common than insects with pale-coloured wings in this species. Which process causes this change in the proportion of insects with dark-coloured wings?
18. Variation and selection  →  18.3. Selection
20. Human influences on ecosystems  →  20.4. Conservation
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37
Reasons why bacteria might be used in biotechnology and genetic engineering are listed. All bacteria are harmless organisms. Bacteria contain plasmids. Bacteria share the same genetic code as other organisms. There is a lack of ethical concerns about using bacteria. Which reasons make bacteria useful in biotechnology and genetic engineering?
21. Biotechnology and genetic modification  →  21.1. Biotechnology and genetic modification
21. Biotechnology and genetic modification  →  21.2. Biotechnology
Open