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Biology Past GCSE Questions
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Science - Higher Tier
Question 1.
a) Identify the types of microbe shown in the diagrams.
Microbe in (i)...........
Microbe in (ii)..........
b) Describe how the skin and breathing organs defend the body against entry of microbes?
c) Explain why diseases are more likely to occur in poorer areas with overcrowded conditions?
d) Why do we feel ill when a disease-causing bacteria or viruses enter our body?
author
12-01-00
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Question 2.
The diagram shows how the fragrance moves away from a women wearing a lot of perfume.
a) What is the name of this process?
b) Give a definition of this process.
c) Give one way to speed up this process.
d) Leaf cells depend upon this process for gas exchange during photosynthesis. Name one gas exchanged in this way.
e) Give two features of leaves that allow them to exchange gases effectively using this process.
f) What is meant by the term concentration gradient?
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