Chapter 8 Practice Paper: Human Reproductive System — mark scheme
Secondary 2 · Lower Secondary Science (G2 / G3)
Mark scheme
Human Reproductive System
Chapter 8 Practice Paper · Maximum mark: 30
Notes for markers
- Award one mark for each point marked [1], up to the marks shown for the part.
- Accept answers worded differently that show the same understanding.
- Units are required where the answer line shows one. ecf: allow an error carried forward.
Section A: Multiple-choice questions[10 marks]
| Question | Answer | |
|---|---|---|
| 1 | AThe nucleus of the sperm fuses with the nucleus of the egg. | 1 |
| 2 | CBiological features, such as blood group, can be passed from parents to offspring. Scars and skills are not. | 1 |
| 3 | BPuberty is the change towards being able to reproduce. Hormones are involved. | 1 |
| 4 | DThe thickened lining is shed when fertilisation has not occurred. | 1 |
| 5 | AA condom is a barrier method. It can also reduce the chance of some infections. It does not cure HIV. | 1 |
| 6 | CChlamydia is a bacterial infection. Antibiotics can treat bacteria. They do not cure viruses such as HIV. | 1 |
| 7 | DHIV is a virus and can lead to AIDS. Antibiotics do not cure viruses. | 1 |
| 8 | BThe ovary releases the egg. The testis produces sperm. | 1 |
| 9 | AThe egg and the sperm nuclei usually fuse in the oviduct. A pregnancy can develop in the uterus. | 1 |
| 10 | CThe fetus receives substances from the parent blood. Alcohol, nicotine and some other drugs can harm development. | 1 |
Section B: Structured questions[20 marks]
| Question | Answer and marking points | Marks |
|---|---|---|
| 1(a) | The fusion of the nucleus of a sperm with the nucleus of an egg.
| 2 |
| 1(b) | Oviduct [1] | 1 |
| 1(c) | The ovary releases the egg. The testis produces sperm.
| 2 |
| Total for Question 1 | 5 | |
| 2(a) | The lining thickens [1] | 1 |
| 2(b) | The lining is shed. That is menstruation.
| 2 |
| 2(c) | The body becomes able to reproduce [1] | 1 |
| 2(d) | Hormones [1] | 1 |
| Total for Question 2 | 5 | |
| 3(a) | A condom is a barrier. The pill is a hormone method that must be used as prescribed.
Do not credit a set of instructions for use. | 2 |
| 3(b) | Syphilis is caused by bacteria.
| 1 |
| 3(c) | HIV is a virus. Antibiotics do not cure viral infections.
| 2 |
| Total for Question 3 | 5 | |
| 4(a) | Nicotine is carried in the blood. Substances in that blood can pass to the fetus and harm its development.
| 2 |
| 4(b) | Food, housing, jobs or healthcare may be limited.
| 1 |
| 4(c) | Fact: it ends a pregnancy. Value question: any one, such as the health of the pregnant person, or beliefs about the embryo.
Do not credit a method. Do not require the student to take one side. | 2 |
| Total for Question 4 | 5 |
— End of mark scheme —