Biology 9700/41 — May/June 2011
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Inheritance · Selection and Evolution · Control and Coordination · Classification, Biodiversity and Conservation · (outdated) Biotechnology · (outdated) Aspects of Human Reproduction · +4 more
The polar bear, Ursus maritimus, lives in the Arctic regions of the USA, Canada, Norway and Russia. Polar bears move across the Arctic ice sheet to hunt prey such as seals.
Fig. 1.1 shows a polar bear.
The area over which the Arctic ice sheet extends varies throughout the year.
Fig. 1.2 shows the variation in the extent of the Arctic ice sheet for the months of July to November for the years 1979 and 2009.
Calculate the percentage reduction in the area over which the ice sheet extends between 1979 and 2009 for the month of September.
Give your answer to the nearest whole number.
Show your working.
answer = ______
In 2008 the government of the USA classified U. maritimus as an endangered species because it is under threat of extinction.
Suggest what has caused U. maritimus to have become endangered.
U. maritimus is a eukaryote. Beneficial bacteria, which are prokaryotic cells, live in the gut of U. maritimus.
State three differences between the cells of U. maritimus and its gut bacteria.
- ______
- ______
- ______
The rest of this paper
9 more questions- Q2(outdated) Biotechnology · Selection and Evolution14M
- Q3(outdated) Aspects of Human Reproduction8M
- Q4Homeostasis · Inheritance15M
- Q5(outdated) Crop Plants · Inheritance8M
- Q6Inheritance · Control and Coordination8M
- Q7Energy and Respiration15M
- Q8Selection and Evolution9M
- Q9Control and Coordination15M
- Q10Photosynthesis15M