Primary 6 · Science · Cycles: Human Reproduction
Cycles: Human Reproduction questions for Primary 6 Science
9 questions to work through online, 2 of them written out the way the paper asks. Answer and you get the working straight away, then a score at the end. No sign-up, and you can retake it as often as you like.
- Comparing with plants
- Naming the first stage
- How the baby is supplied
- Ordering the stages
- Reading growth data
- What the womb provides
- Naming the male cell
- Naming the period of change
- Applying the ideas
| Month | Mass (g) |
|---|---|
| 3 | 30 |
| 5 | 300 |
| 7 | 1400 |
| 9 | 3300 |
Answers and explanations for all 9 questions
Every answer with the reasoning behind it. Worth reading after you have tried the set — or on its own, if you are a parent marking it.
Which of these are true of both human reproduction and flowering plant reproduction?
Answer: A, B and C only
Both need two cells to join, both call it fertilisation, and both produce varied offspring. Where they differ is that a human baby develops inside the mother.
What is the stage labelled W in the diagram above called?
Answer: fertilisation
W is the joining of a sperm and an egg, which is fertilisation.
How does a developing baby receive oxygen before it is born?
Answer: through the umbilical cord, from the mother's blood
Everything the baby needs — oxygen and food — crosses from the mother's blood and travels along the umbilical cord.
According to the diagram above, which stage comes immediately before the baby develops for nine months?
Answer: Y
The order is fertilisation, dividing, settling in the womb, then nine months of development. Y is the settling.
Based on the table above, during which period does the baby gain the most mass?
Answer: months 7 to 9
From 1400 g to 3300 g is a gain of 1900 g, more than either earlier period. Most of the growth happens at the end.
Which two things does the womb provide for a developing baby?
Answer: A and B only
The womb supplies the baby through the mother's blood and surrounds it with fluid for protection. Air and milk both belong to life after birth.
In humans, the male reproductive cell joins with the female egg at fertilisation. What is the male cell called?
Answer: sperm
The male reproductive cell in humans is the sperm.
Between about ten and sixteen, the body changes and becomes able to reproduce. What is this period of change called?
Answer: puberty
The period when the body becomes able to reproduce is puberty.
Why do brothers and sisters resemble their parents but are not identical to them or to each other?
Answer: Each child receives a different mixture of characteristics from both parents.
Two parents contribute at every fertilisation, and the mixture differs each time. That is why siblings share a family likeness without being copies.