NSC Agricultural Sciences Animal Reproduction: 4.1 Identify the type of multipl

Question

4.1 Identify the type of multiple birth illustrated in the diagram above.

4.1.2 Give a reason for the answer in QUESTION 4.1.1.

4.1.3 Indicate TWO characteristics of the twins illustrated in the diagram with regard to:

(a) Gender
(b) Physical appearance

4.1.4 Indicate an enzyme released by the sperm cell to facilitate its penetration in part B.

4.1.5 Name the stage of gestation during which part C is formed.

4.2 The graph below shows the number of cows in oestrus during different time periods.

4.2.1 Translate the data from the graph above to a table.

4.2.2 Suggest the appropriate time to inseminate 10 cows.

4.2.3 Give a reason for the answer in QUESTION 4.2.1.

4.3 During the process of oogenesis and spermatogenesis, the cells undergo mitosis and meiosis, but these divisions give rise to different cells.

Differentiate between oogenesis and spermatogenesis with regard to the following:

4.3.1 Cells formed during mitosis

4.3.2 Cells formed during meiosis 2

4.3.3 Organs where they are formed

4.4 After the process of spermatogenesis has been completed, sperms move through various primary and secondary organs until they reach the mating organ.

Indicate the organ responsible for each of the following functions:

4.4.1 Transports sperms from the epididymis to the urethra.

4.4.2 Secretes a sticky alkaline mucus that gives semen a characteristic smell.

4.4.3 Secretes a buffer that protects sperms against pH changes.

4.5 Difficult birth is a challenge for farmers but can be corrected in some cases by proper management.

4.5.1 Give the term referring to the condition above.

4.5.2 Indicate TWO reasons leading to the condition in QUESTION 4.5.1.

4.6 The illustration below shows processes occurring during a reproductive technique in female animals.

4.6.1 Identify the reproductive technique illustrated above.

4.6.2 Indicate an appropriate name given to an animal represented by sheep 1 and sheep 2.

4.6.3 There are TWO main types of the technique mentioned in QUESTION 4.6.1. Indicate these main types as labelled in A and B.

4.6.4 Indicate the purpose for which the technique labelled B is done.

4.6.5 The technique in A has an economic benefit for the farmer. Validate this statement by mentioning TWO economic benefits of this technique to the farmer.

Number of cows	Time
25	06:00-12:00
10	12:00-18:00
20	18:00-00:00
45	00:00-06:00

4.1 Identify the type of multiple birth illustrated in the diagram above - NSC Agricultural Sciences - Question 4 - 2017 - Paper 1

Worked Solution & Example Answer:4.1 Identify the type of multiple birth illustrated in the diagram above - NSC Agricultural Sciences - Question 4 - 2017 - Paper 1

Identify the type of multiple birth illustrated in the diagram above.

Give a reason for the answer in QUESTION 4.1.1.

Indicate TWO characteristics of the twins illustrated in the diagram with regard to:

Indicate an enzyme released by the sperm cell to facilitate its penetration in part B.

Name the stage of gestation during which part C is formed.

Translate the data from the graph above to a table.

Suggest the appropriate time to inseminate 10 cows.

Give a reason for the answer in QUESTION 4.2.1.

Differentiate between oogenesis and spermatogenesis with regard to the following:

Indicate the organ responsible for each of the following functions:

Give the term referring to the condition above.

Indicate TWO reasons leading to the condition in QUESTION 4.5.1.

Identify the reproductive technique illustrated above.

Indicate an appropriate name given to an animal represented by sheep 1 and sheep 2.

Indicate these main types as labelled in A and B.

Indicate the purpose for which the technique labelled B is done.

Validate this statement by mentioning TWO economic benefits of this technique to the farmer.

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