Pearson Edexcel
Level 3 GCE
Wednesday 21 June
2023 9BN0/03
Biology A (Salters Nuffield)
Advanced
PAPER 3: General and Practical Applications in
Biology
You must have: Total Marks
Ruler, HB pencil, scientific calculator and a copy
of the scientific article adapted from Scientific
American (enclosed)
Instructions
• Use black ink or ball-point pen.
•Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all
• Show all your working out in calculations and include units where
•questions.
appropriate.
Answer the questions in the spaces provided
– there may be more space than you need.
Information
•The total mark for this paper is 100.
•The marks for each question are shown in brackets
– use this as a guide as to how much time to spend
•on each question. You may use a scientific calculator.
•Inforquestions marked with an asterisk (*), marks will be awarded
your ability to structure your answer logically, showing how the
points that you make are related or follow on from each other
where appropriate.
Advice
•Read each question carefully before you start to
•answer it. Try to answer every question.
• Check your answers if you have time at Turn over
the end.
, Answer ALL questions.
Write your answers in the spaces provided.
AREA
DO NOT WRITE IN THIS
1 The heart pumps blood around the circulation system.
(a) Explain why many animals need a heart and circulation system.
(2)
AREA
DO NOT WRITE IN THIS
(b) If the heart of an animal is removed from its body, the heart will
continue to beat for a period of time.
The left atrium stops contracting if it is separated from the rest of
the heart. However, the right atrium and the rest of the heart will
continue to beat.
Eventually, the right atrium and the rest of the heart will also stop beating.
(i) Give a reason why the heart will continue to beat after being
removed from the body.
(1)
, (iii) Explain why the right atrium and the rest of the heart
eventually stop beating. (2)
4
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