Edexcel Mock Biology

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Write your name here
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Centre Number

Candidate Number

Edexcel GCE

Biology
Advanced Subsidiary Unit 4: The Natural Environment and Species Survival Wednesday 16 June 2010 – Morning Time: 1 hour 30 minutes
You do not need any other materials.
Paper Reference

6BI04/01
Total Marks

Instructions
black ink or • Usein the boxesball-point pen. page with your name, at the top of this • Fill number and candidate number. centre • Answer all questions. in the spaces provided the questions • Answermay be more space than you need. – there

Information
total for • The marksmarkeachthis paper is 90.shown in brackets question are • The this asforguide as to how much time to spend on each question. – use a an • Questions labelled with willasterisk (*) are ones where the quality of your written communication be assessed



– you should take particular care with your spelling, punctuation and grammar, as well as the clarity of expression, on these questions. Candidates may use a calculator.

Advice
carefully • Read each questiontime. before you start to answer it. • Keep an eye on the question. • Try to answer every if you have time at the end. • Check your answers

Turn over

N37095A
©2010 Edexcel Limited.

*N37095A0124*

1/1/1/1/1/

Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 Forensic scientists use several different types of evidence to estimate the time of death of a body. (a) Place a cross in the boxes next to the two types of evidence that could be used by a forensic scientist to estimate the time of death of a body. (2) Degree of muscle contraction Length of fingernails Signs of decomposition Skin pigmentation (b) The core temperature of a body can also be used to estimate the time of death. This can be recorded by measuring the temperature of the rectum. The table below shows the mean core temperature, measured at 2-hour intervals after death, using data from a large number of bodies. The standard deviation from each of the means is also shown. Time after death / hours 2 4 6 8 10 12 14 16 18 20 22 24 26 Mean core temperature / °C 36.7 36.0 35.3 31.3 29.6 28.1 26.7 25.5 25.0 23.6 22.8 22.3 21.8 Standard deviation from the mean / °C 0.9 1.1 1.3 1.5 1.7 2.0 2.3 2.6 2.9 3.1 3.3 3.4 3.4

2

*N37095A0224*

Explain what the data indicates about the reliability of using core temperature to estimate the time of death. (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .

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