NSC exam, Agricultural Sciences P1, November 2013
Assignment Type: Revision Paper
Total Marks: Unmarked
Section A - Multiple Choice: Choose the answer and select only the letter (A–D) next to the question
Marks: 20
Question 1:

The stomach of the pig secretes gastric juices containing hydrochloric acid, which is responsible for changing ...

Your Answer:
Question 2:

The part of the digestive system of the fowl responsible for grinding feed with the aid of small stones is represented by the following letter:

Attached Resource:
23eebdc1-6b1c-4e8b-8eac-fa8a9b06f63d.png
Your Answer:
Question 3:

In ruminant animals the required protein value for a ration is supplemented by adding ... to make the feed mixture more cost-effective.

Your Answer:
Question 4:

Which of the following substances are released when roughages are digested by micro-organisms in the rumen?


(i) Fatty acids, (ii) Methane, (iii)Oxygen, and/or (iv) Cellulose


 


 Choose the correct combination:

Your Answer:
Question 5:

Using knowledge passed down from older generations, a livestock farmer mills ashes from a poisonous plant and mixes it with a feed ration to prevent animals from being poisoned. This practice is based on the ... method.


 

Your Answer:
Question 6:

When animals are transported in a truck, the following aspect is important to prevent bruising:


 

Your Answer:
Question 7:

Which of the following are part of an intensive animal production unit?


(i) Large amounts of money invested


(ii) A large area of land with a low production output


(iii) Environmental control and management


(iv) Mechanisation


 


Choose the correct combination.

Your Answer:
Question 8:

ONE of the following is used to keep a large ox still for individual treatment:

Your Answer:
Question 9:

The head is the only part of the sperm cell (spermatozoon) that needs to enter the ovum for fertilisation, because ...

Your Answer:
Question 10:

The facility used to control ticks in the illustration below can best be described as a ...

Attached Resource:
f9b6b463-741f-4152-9063-9573ef546dc6.png
Your Answer:
Column Matching - Indicate whether each of the statements in COLUMN B applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN A. Select the correct Answer, from the choices provided:
Marks: 10
Question 1:
Column AColumn B
A: Maize Meal

Protein-rich concentrate


B: Carcass Meal 
Your Answer:
Question 2:
Column AColumn B
A:Commercial farming                             

A farming unit mainly used to generate food for the family


B: Subsistence farming 
Your Answer:
Question 3:
Column AColumn B
A: Di-oestrus             

The phase of rest in the oestrus cycle


B: Pro-oestrus 
Your Answer:
Question 4:
Column AColumn B
A: Prostrate gland                    

Male accessory gland for secretion of hormones needed in the sexual activity


B: Seminal gland 
Your Answer:
Question 5:
Column AColumn B
A: Viral disease

Has the greatest economic effect on the livestock farming


B: Fungal disease 
Your Answer:
Give ONE word/term for each of the following - (5x 2 marks each)
Marks: 10
Question 1:

The part of the digestive system of a pig where the most absorption of digested nutrients takes place

Your Answer:
Question 2:

The component of a feed that serves as the most important source of heat and energy for an animal

Your Answer:
Question 3:

A traditional African custom where a man pays the father of the bride-to-be with cattle

Your Answer:
Question 4:

The process through which a Graafian follicle of an ovary bursts to release the ovum

Your Answer:
Question 5:

The service rendered by the State where animals are kept in isolation for a particular period while being tested for diseases

Your Answer:
Change the UNDERLINED WORD(S) - in each of the following statements to make them TRUE. ( 5 x 1 mark each)
Marks: 5
Question 1:

Proteins are broken down into glucose during digestion

Your Answer:
Question 2:

Ectothermic animals maintain a constant body temperature even though the environmental temperature may vary.

Your Answer:
Question 3:

The Drakensberger is more adapted to local environmental conditions because it is an exotic breed.

Your Answer:
Question 4:

The intensive farming enterprise where cattle are kept in a small area and fed for maximum production output is called a free-range system.

Your Answer:
Question 5:

Midges form maggots and cause serious wounds on the wet skin around the tail of a wool sheep.

Your Answer:
SECTION B
Diagram below shows digestive system of an animal - Select a letter (A–H) that represents a part of the digestive system that corresponds with each of the following descriptions:
Marks: 8
Attached Section Resource:
1fbca566-141d-47e2-8d89-4662648498b2.png
Question 1:

a) Secretion of hydrochloric acid

Your Answer:
Question 2:

b) Most volatile fatty acids are absorbed

Your Answer:
Question 3:

c) Pancreatic juice is secreted

Your Answer:
Question 4:

Describe THREE adaptations of part C for maximum absorption of digested food.

Your Answer:
Question 5:

Briefly explain the absorption of fat molecules in part C

Your Answer:
The following information was used - during a digestibility trial conducted on a group of ruminant farm animals:
Marks: 7
Attached Section Resource:
416c8b09-dbc3-4eb0-8c44-bc576b2ca54e.png
Question 1:

Calculate the digestibility co-efficient of this feed

Your Answer:
Question 2:

Explain the implication of the value calculated in the question above

Your Answer:
Maize and sunflower oilcake meal - used to prepare a balanced ration for farm animals. These animals need 18% digestible protein in their ration. Maize has a digestible protein content of 9% and sunflower oilcake meal has 38%.
Marks: 7
Question 1:

Use the Pearson square to calculate the ratio of maize to sunflower oilcake meal needed in the feed mixture.

Your answer: Image
Question 2:

Calculate the percentage of maize that is included in this mixture

Your Answer:
State the nutrient element deficiency associated - with each of the following conditions observed in livestock.
Marks: 3
Question 1:

Grazing animals chew dry bones and lick the soil

Your Answer:
Question 2:

Pale mucus membrane

Your Answer:
Question 3:

An enlarged thyroid gland

Your Answer:
The table below shows the composition of two feeds - (A and B).
Marks: 10
Attached Section Resource:
c07525c9-2ea4-4819-b419-db51505f5351.png
Question 1:

Calculate the nutritive ratio (NR) of feed A.

Your Answer:
Question 2:

Identify the feed (A or B) that is most suitable for fattening animals. Justify your answer


Your Answer:
Question 3:

Identify the feed (A or B) that is most suitable for young, growing animals. Justify your answer

Your Answer:
Choose an explanation from the list below - that matches each of the following descriptions of observed animal behaviour.
Marks: 5
Attached Section Resource:
3ef2d6bf-3a49-4f6a-ae29-1df711dc4ca9.png
Question 1:

Female animals in the herd mount other females and allow females to mount them

Your Answer:
Question 2:

A flock of animals graze on natural pasture

Your Answer:
Question 3:

An animal has lost its appetite

Your Answer:
Question 4:

Animals do not want to enter a gate to a passage area

Your Answer:
Question 5:

Animal is aggressive after giving birth

Your Answer:
The table below gives data - on temperature indicators and heat production for three different farm animals.
Marks: 8
Attached Section Resource:
6aefa79a-873a-4531-98e7-d42d1efaba71.png
Question 1:

Identify the animal with the highest heat production per hour. Give a reason for your answer by referring to the data in the table


 

Your Answer:
Question 2:

Give TWO possible reasons why chicks would need the most intensive environmental control measures.

Your Answer:
Question 3:

Define the optimum temperature range for production output.

Your Answer:
Question 4:

Explain why pigs are kept in a sheltered environment in winter by referring to the data above.

Your Answer:
Read the passage below - Answer the questions that follow:
Attached Section Resource:
5807659d-35aa-4b4f-95c8-867fd4ed3a96.png
Refer to the above - Describe the adaptation of Mbuzi goats under the following headings:
Marks: 7
Question 1:

Environmental conditions

Your Answer:
Question 2:

Pest and disease management

Your Answer:
Question 3:

Most of the time, Mbuzi goats are kept under extensive conditions. They are only gathered for normal management practices. Name THREE such management practices.

Your Answer:
An animal (A) from a small production unit - is compared to an animal (B) from a large production unit. It is calculated that both animals use approximately 6 kg of their daily feed intake for maintenance. The production output and feed intake of the two animals are indicated in the table below
Marks: 5
Attached Section Resource:
9518a1f5-f443-4e68-912b-f5d0ce406da5.png
Question 1:

Calculate the quantity of feed that each animal used for production.

Your Answer:
Question 2:

Identify the animal (A or B) that used its ration more effectively. Motivate your answer.

Your Answer:
The picture below shows a broiler production unit.
Attached Section Resource:
9f461515-c721-4470-a0b8-73b02d3562eb.png
Choose the equipment from the list above - that would be used in each of the following 4 cases. Each type of equipment can be named only once.
Marks: 10
Question 1:

To keep the temperature inside the broiler unit constant day and night

Your Answer:
Question 2:

To increase the temperature inside the broiler unit during a sudden drop in the environmental temperature

Your Answer:
Question 3:

To decrease the temperature in the broiler unit on a very hot day

Your Answer:
Question 4:

To reduce the possibility of bringing pathogens into the broiler unit

Your Answer:
Question 5:

State FOUR possible characteristics of an intensive animal production unit based on the broiler unit shown above.

Your Answer:
Question 6:

What is the greatest health risk for such a broiler unit? Give a reason to support your answer.

Your Answer:
The diagram illustrates pregnancy testing in a cow - The hand is inserted through the rectum.
Marks: 7
Attached Section Resource:
a17bd91a-cf97-4774-b0fd-32048b22b5e9.png
Question 1:

Identify parts A, B and C

Your Answer:
Question 2:

State TWO advantages of detecting pregnancy early.

Your Answer:
Question 3:

Explain the role of the mucus plug found in part C

Your Answer:
Name the condition that would occur - in each of the following 2 situations:
Marks: 5
Question 1:

The foetus dies, decays and remains inside the cow

Your Answer:
Question 2:

The fluid around the foetus is reabsorbed and a hard skeleton remains

Your Answer:
Question 3:

Pregnancy could be terminated before natural parturition with the expulsion of a visible foetus. Identify this situation and give TWO possible causes thereof

Your Answer:
The diagram below shows a structure in - the female reproductive system of a farm animal.
Marks: 3
Attached Section Resource:
07709c1f-3b40-430b-b890-eb7279e46d3a.png
Question 1:

Name structures A, B and E

Your Answer:
Name the hormone associated - with each of the following 4 functions:
Marks: 6
Question 1:

Stimulating the development of structure B

Your Answer:
Question 2:

Stimulating process D

Your Answer:
Question 3:

Characterises the visible signs of oestrus

Your Answer:
Question 4:

Secreted by structure F

Your Answer:
Question 5:

Describe how structure E is adapted to succesfully capture the ovum

Your Answer:
Study the table below - It indicates some of the indigenous methods used to control diseases and pests in livestock.
Marks: 14
Attached Section Resource:
1d12519a-4f01-4bf3-adef-dc44ce53ba57.png
Question 1:

Identify an indigenous control method that is comparable to the chemical control of diseases.

Your Answer:
Question 2:

State the TWO most commonly used methods in controlling pests and diseases by referring to the table above.

Your Answer:
Question 3:

State TWO ways in which bush burning could control infestations of ticks.

Your Answer:
Question 4:

Draw a bar graph to indicate the frequency of the use of indigenous control methods.

Your answer: Image
Question 5:

Name THREE conventional control measures that a farmer should adopt to restrict infectious diseases.

Your Answer:
END OF EXAM - GRAND TOTAL: 150 marks
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