6028Q2 SPECIMEN ANIMAL SCIENCE

Extracted Content: 6028Q2 SPECIMEN ANIMAL SCIENCE

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Candidate Name Centre Number Candidate Number

For Pesfo

ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General C ertificate of Education Advanced Level

ANIMAL SCIENCE 6028/2

PAPER 2

SPECIMEN PAPER 2 hours 30 minutes

Additional materials:
Answer paper,
Scientific calculator.

TIME 2 hours 30 minutes

INSTRUCTIONS TO CANDIDATES
Write your name, Centre number and candidate number in the spaces provided at the top of
this page and on all separate answer paper used.

Section A
Answer all questions.
Write your answers in the spaces provided on the question paper. |FOR EXAMINER’S USE
Section B
Answer any two questions. Section A
Write your answers on the separate answer paper provided.
At the end of the examination, fasten the separate answer Section B
paper securely to the question paper.

INFORMATION FOR CANDIDATES

Marks are given in brackets [ ] at the

end of each question or part question.

Y ou are advised to spend no longer than 80 minutes
on Section A.

This specimen paper consists of 8 printed pages.

Copyright: Zimbabwe School Examinations Council, Specimen Paper.
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2 Section A Answer all questions

(a) Explain the functions of the smooth endoplasmic reticulum.

(b) Indigenous breeds of livestock have adapted to the Zimbabwean
environment. Explain any two adaptive characteristics they have in
common.

(©) Explain the functions of phospholipids in cell membranes.

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(a) Outline the functions of the lymphatic system.

(b) Figure 1 shows vessels that carry blood to and from the heart.
Name the parts labelled A, B, C and D.

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(a)

(b)

From Figure 1, identify blood vessels that carry blood to:

@ rest of the body.

di lungs.

Differentiate between true and apparent digestibility.

@ True digestibility,

(ii) Apparent digestibility.

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(a) When a red polled bull (RRPP) is crossed with a white homed cow (rrpp) all F: are roan and polled (RrPp).

@ What type of dominance is operative in terms of coat colour?

(ii) | By means of a genetic diagram determine the expected F2
phenotypic ratios after selfing the Fioffsprings.

(ii) Why is it difficult to establish a herd with all roan cattle
compared to a herd with all red cattle?

(b) — Genetic improvement of livestock breeds depend on heritability.

@ define heritability.

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(a)

6
Gi) Explain why it is relatively more difficulty to improve

fertility traits compared to productive traits through breeding
and selection.

Describe the following terms as they are used in animal breeding:

@ Natural selection,

di Artificial selection,
(iii) Scientific selection.

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(b) _ Discuss the objectives of animal breeding.

(a) _—_ Identify any four methods of preserving meat.

(b) Explain problems associated with in-breeding in animal
production.

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10

(a)

(b)

8
Section B
Briefly describe the characteristics of the following muscle types:
@ skeletal,
di smooth,
(iii) cardiac.

Describe the following types of breathing:

@ Eupnea,
di Dioaphramatic,
(iii) Coastal,
(iv) Apnea,

(v) | Hyperpnea.

Describe the causes of ill health in farm animals under the following:

(a)
6b)

Nutritional problems,

Pathogenic organisms.

Discuss factors considered when formulating feeds for livestock in
Zimbabwe.

(a)

(b)

Outline the advantages and disadvantages of rotational grazing
systems in livestock production.

@ Advantages,
di Disadvantages.

Explain the advantages of indigenous breeds over exotic breeds of
livestock.

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