B7 (Biology) IDEAS IN CONTEXT- Potential questions and answers

HERE ARE THE POTENTIAL QUESTIONS (given by my teacher) AND POSSIBLE ANSWERS (written by myself). I can't guarantee the longer ones are 100% right, but they should give you a good idea of what they could ask, and what the answers may be! I hope they help! If you have any comments, queries (or you want to correct some of my answers), then comment below :). I have also added some links to useful websites, and added 6 extra questions I've found on the internet!

Good luck with you revision guys! I have also posted some information that you may need to know for the Ideas In Context, along with some key terms-  


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B7 Ideas in Context June 2012
Below is a scanned copy of a sheet given by my Biology teacher. The words found at the top of the
page are topics which the biology department think will come up. On the sheets above, I have tried
to explore some of these topics.
I will try my best to answer the questions on the sheet, but again, I cannot guarantee that my
answers are correct- they're just there to give you an idea of what I think they are. Some of the
answers are obviously correct, but the long answers could potentially be wrong or incorrect. If you
think any of my answers are obviously wrong, then please comment in the comment box.

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Answer- biodiversity is the number and the range of organisms living in an area.
2) Answers:
- Organisms could become limited with the essential factors they have access to (especially if
the `alien species' are more `aggressive').
-Some organisms are being replaced by those that are not native to the environment.
- Interbreeding can take place with the `alien species' and native species, and so infertile
offspring can result.
3) Answers- The ruddy duck, the harlequin ladybird and the Asian Tiger Mosquito.…read more

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Answer- Malaria.
10) Answer- over the years, natural selection in South East Asia would have meant that people
adapted and evolved as a method of protection from the illness. Natural selection is where
organisms which are best suited to their environment survive, and so achieve greater reproductive
success because their less likely to be affected. Because of this, they are also more likely to
reproduce, thereby passing advantageous genetic characteristics to future generations.…read more

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A potential benefit- the spread of the alien invader `Knotweed' (which will currently be competing
for essential factors with other plants, such as soil) would be reduced by the introduction of the
18) Answer- the large leaves means that it can absorb more of the sun's energy, as there will be
more chlorophyll, a chemical present in the chloroplasts of green leaves.…read more

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Articles you might want to read:
http://peconice.ipower.com/InvPolygonum.html - information on the Japanese Knotweed
http://www.ehow.com/about_6383550_do-ladybugs-environment_.html - the benefit of
ladybirds for farmers
http://www.metro.co.uk/news/688371-alarm-over-killer-mosquito-threat-to-uk - article on
the threat of African Mosquitoes.
http://www.guardian.co.uk/environment/2012/mar/08/ruddy-ducks-extermination - article
on the extermination of ruddy ducks.…read more


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