NSC Agricultural Sciences Animal Nutrition: 1.1 Various options are provided

Question

1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1.1 to 1.1.10) in the ANSWER BOOK, e.g. 1.1.1 B.

1.1.1 A cost-effective protein supplement for a ruminant animal is ...
A fish meal.
B cottonseed oil-cake meal.
C urea.
D carcass meal.

1.1.2 Keratomalacia is caused by a deficiency of ... in farm animals.
A thiamine.
B vitamin A.
C calcium.
D vitamin C.

1.1.3 The small intestine is adapted for effective absorption of nutrients because:
(i) It has many folds to increase the surface area.
(ii) Its length decreases the surface area for absorption.
(iii) It has muscles that contract and relax to move nutrients.
(iv) It has small finger-like projections.

Choose the CORRECT combination:
A (i), (iii) and (iv)
B (ii), (iii) and (iv)
C (i), (ii) and (iv)
D (i), (ii) and (iii)

1.1.4 The part of the alimentary canal of ruminant animals responsible for chemical digestion:
A Rumen.
B Reticulum.
C Omasum.
D Abomasum.

1.1.5 Protection against ... is NOT an advantage of shelters in livestock production.
A optimum temperatures
B predators
C cold temperatures
D rainfall

1.1.6 The following refer to an extensive production system:
(i) Animals kept at a low density
(ii) No environmental control and management
(iii) More labour and care needed for the animals
(iv) There are lower inputs

Choose the CORRECT combination:
A (i), (ii) and (iv)
B (ii), (iii) and (iv)
C (i), (ii) and (iv)
D (i), (ii) and (iii)

1.1.7 ... is a protozoal disease in fowls that results in thin watery diarrhoea containing mucus.
A Avian flu
B Coccidiosis
C Newcastle disease
D H1N1

1.1.8 The effects of external parasites may be reduced by:
A applying fewer concentrated pesticides regularly.
B dipping animals frequently using smaller dosages.
C exposing animals to the parasite to develop resistance.
D reducing the strength of the pesticide to save money.

1.1.9 Multiplets formed from the release of more than one ovum are ...
A identical.
B monozygotic.
C fraternal.
D non-identical.

1.1.10 The hormone that causes the corpus luteum to regress, as an indication that the cow is not pregnant:
A Oestrogen.
B Prostaglandin.
C Relaxin.
D Progesterone.

1.2 Indicate whether each of the descriptions in COLUMN B applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN A.

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Answer

1.2.1 Both A and B 1.2.2 None 1.2.3 A only 1.2.4 Both A and B 1.2.5 B only

COLUMN A                                  COLUMN B
1.2.1 A: Oat straw                        High crude fibre content
1.2.2 A: Lipase                             Enzyme responsible for protein digestion
1.2.3 A: Amylase                          Enzyme responsible for protein digestion
1.2.4 A: Pigsty                              Microscopic parasites with mouth parts used to suck blood and cause irritation to the host
1.2.5 A: Chin-ball marker               Method dairy farmers can adopt to assist with the identifying of cows in heat.

1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Sciences - Question 1 - 2020 - Paper 1

Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Sciences - Question 1 - 2020 - Paper 1

1.1.1 A cost-effective protein supplement for a ruminant animal is ...

1.1.2 Keratomalacia is caused by a deficiency of ... in farm animals.

1.1.3 The small intestine is adapted for effective absorption of nutrients because:

1.1.4 The part of the alimentary canal of ruminant animals responsible for chemical digestion:

1.1.5 Protection against ... is NOT an advantage of shelters in livestock production.

1.1.6 The following refer to an extensive production system:

1.1.7 ... is a protozoal disease in fowls that results in thin watery diarrhoea containing mucus.

1.1.8 The effects of external parasites may be reduced by:

1.1.9 Multiplets formed from the release of more than one ovum are ...

1.1.10 The hormone that causes the corpus luteum to regress, as an indication that the cow is not pregnant:

1.2 Indicate whether each of the descriptions in COLUMN B applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN A.

1.3 Give ONE word/term for EACH of the following descriptions.

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