Biology 9700/42 — October/November 2010
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Inheritance · Selection and Evolution · Energy and Respiration · Classification, Biodiversity and Conservation · (outdated) Biotechnology · (outdated) Aspects of Human Reproduction · +5 more
The Great Lakes, in North America, lie between the USA and Canada. A survey of birds of the Lake Ontario area has shown the relative abundance of birds between 1995 and 2005.
Table 1.1 shows the feeding habits and the relative change in numbers of some of the birds in the survey.
Table 1.1
| name | feeding habit | percentage change in numbers between 1995 and 2005 |
|---|---|---|
| mallard Anas platyrhynchos | amphibia, plants | +10.0 |
| tree swallow Tachycineta bicolor | flying insects | – 6.2 |
| blue-winged teal Anas discors | aquatic insects, molluscs, plants | –12.3 |
| pied-billed grebe Podilymbus podiceps | amphibia, aquatic insects, fish | –15.9 |
| black tern Chlidonias niger | aquatic insects, fish, flying insects | –18.7 |
Using the information in Table 1.1 suggest reasons for the changes in numbers of these birds.
An ecosystem that has a wide range of species has a high biodiversity.
Explain the benefits of maintaining biodiversity.
The rest of this paper
9 more questions- Q2(outdated) Biotechnology · Inheritance · Selection and Evolution16M
- Q3(outdated) Aspects of Human Reproduction7M
- Q4Homeostasis · Genetic Technology15M
- Q5Energy and Respiration · (outdated) Crop Plants9M
- Q6Inheritance · Selection and Evolution7M
- Q7Control and Coordination8M
- Q8Photosynthesis15M
- Q9Inheritance15M
- Q10Energy and Respiration15M