Formative Practice 4.6 – Science Form 1 Chapter 4


Question 1:
List four factors of sterility in males and females.

Answer:
Factors of male sterility:
(i) Low quality of sperm
(ii) Low sperm count
(iii) Testes cannot produce sperm
(iv) Impotent

Factors of female sterility:
(i) Ovaries cannot produce ovum
(ii) Blockage in the Fallopian tubes
(iii) Abnormal uterus
(iv) Tumour in the uterus


Question 2:
What methods can be used to help a married couple to have a child if
(a) the husband is sterile?
(b) the wife has a blockage in her Fallopian tubes?

Answer:
(a) Hormone injection and surgery

(b) Treatment using IVF method


Question 3:
Explain vasectomy and ligation method.

Answer:
(a) Vasectomy: sperm ducts are cut and the two ends are then tied to prevent the sperms from being transported to the urethra.

(b) Ligation: both Fallopian tubes are cut and the two ends are then tied to prevent the ovum from meeting the sperms.


Question 4:
What is meant by test tube baby?

Answer:
Test tube baby is a baby that is formed using the IVF method. The sperm and ovum are fertilised in a glass dish. Then, the fertilised embryo is put inside the uterus to develop.


Question 5:
State two importance of practising frequent health screening for an individual.

Answer:
Frequent health screening can detect the early symptoms of chronic diseases and reduce the risk of health problems which require high-cost treatments.


Question 6:
Abortion should not be the method to prevent birth. Give your opinion.

Answer:
Abortion should not be the method to prevent birth because each living being has the right to live even in the womb.

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