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Pearson Edexcel International GCSE (9–1)
Time 1 hour 15 minutes
Paper
reference 4BI1/2BR
Biology
Unit: 4BI1
PAPER: 2BR
You must have: Total Marks
Calculator, ruler
Instructions
• Use black ink or ball-point pen.
• centrethe
Fill in boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
• The total mark for this paper is 70.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
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• Read each question carefully before you start to answer it.
• Try to answer every question.
• your answers if you have time at the end.
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P69610A
©2022 Pearson Education Ltd.
L:1/1/1/1/1/E2/
, 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 Read the passage below. Use the information in the passage and your own
knowledge to answer the questions that follow.
Moving plants
Flowering plants reproduce using different methods to transfer the pollen from
plant to plant. This cross‑pollination enables plants to produce offspring that
show genetic variation. The transfer can be done by animals such as insects or
by wind.
5 The reliance on animals and wind for reproduction does not end with pollination.
Flowering plants also need a mechanism to disperse their fruits or the seeds they
contain. This seed dispersal means that seeds producing new young plants will
germinate away from the parent plant.
wings on a sycamore fluff on a dandelion spines on burdock
(Source: © joanna wnuk/Shutterstock) (Source: © Viktorija Reuta/Shutterstock) (Source: © Paulpixs/Shutterstock)
The simplest method of seed dispersal uses gravity. The seeds are within heavy
10 fruit, which fall from the tree when they are ripe. Although some of the fruit may
roll away from the parent plant, most remain close to the parent plant.
Animal dispersal is when plants rely on animals to transport their seeds to a different
area. This may be because the seeds are surrounded by a brightly‑coloured and
sweet‑tasting fruit. Examples of this are soft fruits such as raspberry and hard
15 fruits such as apple.
Animals may also carry seeds in a different way. Many plants produce fruits or
individual seeds covered in hooks or spines that attach the seeds to the animals’
fur. The seeds are then carried away from the parent plant. Eventually, the seeds
may fall off, or be rubbed off by the animal. Examples of plants using this form of
20 dispersal are burdock and sea holly.
Some plants provide seed pods with a mechanism that ejects the seeds from the
pod by force. All of these rely on the effect of evaporation of water in the seed
pod, so this method of seed dispersal usually takes place in sunlight. Examples of
plants using this form of dispersal are gorse bushes and lupins.
2
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