Exam (elaborations)
AQA A LEVEL BIOLOGY 2020 PAPER 3 QP
- Course
- EXAM
- Institution
- University Of South Africa (Unisa)
AQA A LEVEL BIOLOGY 2020 PAPER 3 QP
[Show more]
Content preview
AQA A LEVEL BIOLOGY 2020 PAPER 3 QP, Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 3
Monday 15 June 2020 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements
Question Mark
• a scientific calculator.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page.
• Answer all questions in Section A. 4
• Answer one question from Section B. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages.
7
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). TOTAL
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
*JUN207402301*
Downloaded by: jessicaonyebuchi | onyjessica1@gmail.com
IB/M/Jun20/E14
Distribution of this document is illegal
7402/3
, Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides
2
Do not write
outside the
Section A box
Answer all questions in this section.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 Guppies are small fish. Female guppies are dull in colour. Male guppies can be
bright or dull in colour.
Scientists investigated the effect of female brain size on choosing a mate. They used
laboratory-bred female guppies with large brains and with small brains.
They set up a fish tank as shown in Figure 1.
Figure 1
They observed each female for 10 minutes and recorded which male they were
attracted towards. They repeated this with 45 large-brained females and
45 small-brained females.
0 1 . 1 Suggest three possible limitations of this investigation.
[3 marks]
1
2
3
*02* Downloaded by: jessicaonyebuchi | onyjessica1@gmail.com
IB/M/Jun20/7402/3
Distribution of this document is illegal
, Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides
3
Do not write
outside the
Guppies with large brains are better at identifying predators. box
The scientists found that only female guppies with large brains were attracted to
male guppies bright in colour.
0 1 . 2 Suggest and explain the advantage of this behaviour to the population of guppies.
[3 marks]
0 1 . 3 Describe how the behaviour of female guppies could result in sympatric speciation.
[3 marks]
9
Turn over ►
*03* Downloaded by: jessicaonyebuchi | onyjessica1@gmail.com
IB/M/Jun20/7402/3
Distribution of this document is illegal
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Examhub. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R75,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80467 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now