International GCSE Biology

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Edexcel Certificate Edexcel International GCSE

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Candidate Number

Biology

Unit: KBI0/4BI0 Science (Double Award) KSC0/4SC0 Paper: 1B

Wednesday 9 January 2013 ? Morning Time: 2 hours

Paper Reference

KBI0/1B 4BI0/1B KSC0/1B 4SC0/1B

You must have: Ruler Calculator

Total Marks

Instructions

Use black ink or ball-point pen.

tt Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions.

tt Answer the questions in the spaces provided t ? 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 120.

tt The marks for each question are shown in brackets ? use this as a guide as to how much time to spend on each question.

Advice

Read each question carefully before you start to answer it.

t Keep an eye on the time. t Write your answers neatly and in good English. t Try to answer every question. tt Check your answers if you have time at the end.

P41536A

?2013 Pearson Education Ltd.

1/1/1/1/

*P41536A0128*

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Answer ALL questions. 1 The diagram shows some structures in the human breathing system.

A B

(a) Name structures A and B. (2)

A ..............................................................................................................................................................................................................................................................................

B ..............................................................................................................................................................................................................................................................................

(b) The table shows the level of two gases, X and Y, in blood entering and leaving the lungs during the process of gas exchange.

Level of gas in cm3 per 100 cm3 of blood

Gas

Blood entering lungs

Blood leaving lungs

X

10.6

19.0

Y

58.0

50.0

(i) Name the two gases. (2)

gas X ...................................................................................................................................................................................................................................................................

gas Y ...................................................................................................................................................................................................................................................................

2

*P41536A0228*

(ii) How much of gas X enters 100 cm3 of blood, before the blood leaves the lungs? (1)

cm3

..............................................................

(iii) What term is used to describe how the process of gas exchange takes place? Put a cross in the box to indicate your answer. (1) A active transport B diffusion C transpiration D osmosis (Total for Question 1 = 6 marks)

*P41536A0328*

3

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2 The passage describes selective breeding. Complete the passage by writing a suitable word in each of the spaces. (4) Selective breeding involves ............................................................................. choosing organisms with desired . ............................................................................. These organisms are allowed to breed and produce ............................................................................. . The process is for several generations. ............................................................................. (Total for Question 2 = 4 marks)

4

*P41536A0428*

3 This food chain shows feeding relationships in paddy fields in Sri Lanka and India.

rice (a) (i) Name the producer.

beetle

Asian toad

mongoose (1)

....................................................................................................................................................................................................................................................................................

(ii) Name the secondary consumer. (1)

....................................................................................................................................................................................................................................................................................

(b) Give two environmental factors that could affect the growth of the rice crop. (2)

1 ...............................................................................................................................................................................................................................................................................

2 ...............................................................................................................................................................................................................................................................................

(c) Suggest why a farmer might choose to use a chemical pesticide in his paddy field. (2)

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

(d) Describe how the farmer could use biological control in his paddy field. (2)

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................................................................................

(Total for Question 3 = 8 marks)

*P41536A0528*

5

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