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Science Quiz - Reproduction 02 (Questions)

Reproduction ensures the survival of species. In KS3 Science, students explore how plants and animals create offspring and why reproduction is vital for life on Earth.

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Fascinating Fact:

Male anglerfish are tiny compared to females and actually fuse to the female’s body during mating.

In KS3 Science, reproduction is studied to understand how new individuals are created. Pupils learn how reproduction differs between plants and animals and why genetic variation matters.

Key Terms

Fertilisation: The joining of male and female sex cells to form a new organism.
Gametes: Specialised sex cells such as sperm and eggs in animals, or pollen and ovules in plants.
Genetic Variation: Differences in characteristics between individuals caused by different combinations of genes.

Frequently Asked Questions (Click to see answers)

What is fertilisation in KS3 Science?

Fertilisation is when a male and female gamete join together to form a zygote, which develops into a new individual.

How do animals reproduce?

Most animals reproduce sexually, with sperm and egg cells combining during fertilisation. Some can also reproduce asexually, though this is less common.

Why is genetic variation important?

Genetic variation is important because it increases a species’ chances of survival by producing individuals with different strengths and adaptations.

Try These Related Quizzes

1.

Which of the following physical changes, in girls, during adolescence is NOT true?

[ ]	Breasts start to develop
[ ]	Hips get narrower
[ ]	Ovaries start to release eggs
[ ]	Pubic and underarm hair grow

2.

Which of the following physical changes, in boys, during adolescence is NOT true?

[ ]	Facial hair grows
[ ]	Muscles and penis grow bigger
[ ]	Testes start to produce sperm
[ ]	Voice becomes higher

3.

The physical changes during adolescence occur .......

[ ]	because glands make hormones to start the changes
[ ]	because you feel and think differently
[ ]	because you have mood swings
[ ]	because your emotions change

4.

Which of the following does an implanted fertilised egg NOT need?

[ ]	Carbon dioxide
[ ]	Food
[ ]	Oxygen
[ ]	Warmth

5.

The fertilised egg starts to divide. At first it is called .......

[ ]	a baby
[ ]	a foetus
[ ]	a period
[ ]	an embryo

6.

Which of the following is NOT true?

[ ]	Carbon dioxide passes from the foetal blood to the mother
[ ]	Food passes from the mother's blood to the foetal blood
[ ]	Oxygen passes from the mother's blood to the foetal blood
[ ]	The foetal blood and the mother's blood mix

7.

Which of the following is NOT true about a sperm cell?

[ ]	It has a tail which moves so it can swim
[ ]	The head contains enzymes to make a hole in the egg cell
[ ]	The nucleus contains chromosomes
[ ]	They live for a long time

8.

Which of the following is NOT true about an egg cell?

[ ]	It has a massive food store for the developing embryo
[ ]	It is much larger than a sperm cell
[ ]	One egg is only ever released at a time
[ ]	The nucleus contains chromosomes

9.

Which of the following does NOT control the menstral cycle?

[ ]	A fertility drug
[ ]	Oestrogen alone
[ ]	Oestrogen and progesterone together
[ ]	Progesterone alone

10.

Which of the following does NOT reduce fertility?

[ ]	Female sex hormone in a fertility drug
[ ]	Female sex hormone in an oral contraceptive
[ ]	Female sex hormone to prevent ovulation
[ ]	Female sex hormone to mimic pregnancy

You can find more about this topic by visiting BBC Bitesize - Reproduction

Science Quiz - Reproduction 02 (Answers)

1.

Which of the following physical changes, in girls, during adolescence is NOT true?

[ ]	Breasts start to develop
[x]	Hips get narrower
[ ]	Ovaries start to release eggs
[ ]	Pubic and underarm hair grow

Hips get wider

2.

Which of the following physical changes, in boys, during adolescence is NOT true?

[ ]	Facial hair grows
[ ]	Muscles and penis grow bigger
[ ]	Testes start to produce sperm
[x]	Voice becomes higher

Voice becomes deeper

3.

The physical changes during adolescence occur .......

[x]	because glands make hormones to start the changes
[ ]	because you feel and think differently
[ ]	because you have mood swings
[ ]	because your emotions change

The others are all emotional changes which occur as the brain develops from that of a child to that of an adult

4.

Which of the following does an implanted fertilised egg NOT need?

[x]	Carbon dioxide
[ ]	Food
[ ]	Oxygen
[ ]	Warmth

Carbon dioxide is removed as the fertilised egg develops

5.

The fertilised egg starts to divide. At first it is called .......

[ ]	a baby
[ ]	a foetus
[ ]	a period
[x]	an embryo

The embryo is called a foetus at about nine weeks

6.

Which of the following is NOT true?

[ ]	Carbon dioxide passes from the foetal blood to the mother
[ ]	Food passes from the mother's blood to the foetal blood
[ ]	Oxygen passes from the mother's blood to the foetal blood
[x]	The foetal blood and the mother's blood mix

The two blood supplies NEVER mix but materials are transferred from mother to foetus through the placenta

7.

Which of the following is NOT true about a sperm cell?

[ ]	It has a tail which moves so it can swim
[ ]	The head contains enzymes to make a hole in the egg cell
[ ]	The nucleus contains chromosomes
[x]	They live for a long time

They live for a very short time

8.

Which of the following is NOT true about an egg cell?

[ ]	It has a massive food store for the developing embryo
[ ]	It is much larger than a sperm cell
[x]	One egg is only ever released at a time
[ ]	The nucleus contains chromosomes

Sometimes two (or more) eggs are released at the same time. When this happens, if they are all fertilised, non-identical twins form

9.

Which of the following does NOT control the menstral cycle?

[x]	A fertility drug
[ ]	Oestrogen alone
[ ]	Oestrogen and progesterone together
[ ]	Progesterone alone

Oestrogen causes the uterus lining to thicken, progesterone maintains the lining. Together they control ovulation

10.

Which of the following does NOT reduce fertility?

[x]	Female sex hormone in a fertility drug
[ ]	Female sex hormone in an oral contraceptive
[ ]	Female sex hormone to prevent ovulation
[ ]	Female sex hormone to mimic pregnancy

The fertility drug stimulates eggs to mature and be released