Biology: Ruddy Duck and Egg Cell

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  • Topic: Ruddy Duck, White-headed Duck, Ducks
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Centre Number

Candidate Number

Name

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education BIOLOGY Paper 3 Extended May/June 2005 1 hour 15 minutes Candidates answer on the Question Paper. There are no Additional Materials.

0610/03

READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen in the spaces provided on the Question Paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part questions.

FOR EXAMINER’S USE 1 2 3 4 5 6 TOTAL This document consists of 15 printed pages and 1 blank page. IB05 06_0610_03/3RP  UCLES 2005

[Turn over

2 1 Three plants were grown to study the effects of nitrate and magnesium ion deficiency on their development. They were kept in the same conditions, except for the types of minerals supplied. Plant A was provided with all essential minerals. Plant B was given all minerals except nitrate ions. Plant C was given all minerals except magnesium ions. Fig. 1.1 shows the plants a few weeks later.

For Examiner's Use

normal, healthy leaf

pale green leaf

yellow leaf yellow, dead leaf

A

B
Fig. 1.1

C

© UCLES 2005

0610/03/M/J/05

3 (a) State three conditions, other than water and the concentration of mineral ions, that would need to be kept the same for all the plants, in order to make the investigation a fair test. 1. 2. 3. [3]

For Examiner's Use

(b) Describe and explain the effect on plant growth of (i) a deficiency of nitrate ions on plant B; description

explanation

[4] (ii) a deficiency of magnesium ions on plant C. description

explanation [2]

© UCLES 2005

0610/03/M/J/05

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4 (c) A farmer tested the soil in a field and found that there was a high nitrate ion concentration. The farmer then grew a crop in this field. After the crop was removed, the soil was tested again. The nitrate ion concentration had decreased. (i) Suggest two reasons why the nitrate ion concentration had decreased. 1. 2. [2]

For Examiner's Use

(ii) Describe two methods the farmer could use to improve the nitrate ion concentration in the soil. 1.

2. [2]

(d) Some species of plant grow well in soil that is always low in nitrate ions. Explain how they can obtain a source of nitrogen compounds.

[3] [Total: 16]

© UCLES 2005

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5 2 Fig. 2.1 shows a section through the eye with a ray of light passing through it and four muscles labelled A, B, C and D.

For Examiner's Use

light

B A

D

C

Fig. 2.1 (a) Complete the table.

part

name of muscle

effect of contraction

allows the lens to become fatter for A focusing on close objects

B

iris circular muscle

[2]

© UCLES 2005

0610/03/M/J/05

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6 Muscles C and D are voluntary muscles that are antagonistic. They are attached to the eye socket of the skull. (b) (i) Explain the terms voluntary and antagonistic. voluntary

For Examiner's Use

antagonistic [2] (ii) Suggest the effect on the eye when muscle C contracts.

[1] (iii) Explain how the eye would return to its original position after this contraction.

[2]

© UCLES 2005

0610/03/M/J/05

7 (c) Light passes through parts of the eye to reach the retina. Complete the flow chart by putting the following terms in the boxes to show the correct order that the light passes through them. aqueous humour cornea lens pupil vitreous humour

For Examiner's Use

retina

[2] (d) The retina contains rods and cones. Complete the table to distinguish between rods and cones. type of light detected distribution in the retina

rods

cones

[4] [Total: 13]

© UCLES...
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