Primary 5 Science Life Cycles Quiz

TuitionGoWhere Primary School (AI)

Primary 5 Science - Life Cycles

Quiz 01 | Pre-PSLE Preparation

Name: _________________________ Date: _____________ Score: ___ / 50

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Section A: Multiple Choice Questions (2 marks each)

1. Which of the following shows the correct life cycle of a butterfly?

• A) Egg → Larva → Adult → Pupa
• B) Egg → Pupa → Larva → Adult
• C) Egg → Larva → Pupa → Adult
• D) Egg → Adult → Larva → Pupa

2. What type of life cycle does a cockroach undergo?

• A) Complete metamorphosis
• B) Incomplete metamorphosis
• C) No metamorphosis
• D) Direct development

3. Which part of a flowering plant develops into a fruit?

• A) Petal
• B) Sepal
• C) Ovary
• D) Anther

4. During pollination, pollen grains are transferred from the:

• A) Stigma to the anther
• B) Anther to the stigma
• C) Ovary to the anther
• D) Stigma to the ovary

5. Which of the following animals does NOT undergo metamorphosis?

• A) Frog
• B) Butterfly
• C) Chicken
• D) Mosquito

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Section B: Fill in the Blanks (2 marks each)

6. The four stages in the life cycle of a frog are: egg → _____________ → _____________ → adult frog.

7. In flowering plants, _____________ is the transfer of pollen from the anther to the stigma, while _____________ is the joining of the male and female sex cells.

8. The young stage of a butterfly is called a _____________ or _____________.

9. Animals that look like miniature adults when they are born are said to undergo _____________ development.

10. The _____________ contains the male sex cells (pollen) while the _____________ contains the female sex cells (ovules).

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Section C: Short Answer Questions (4 marks each)

11. The diagram shows the life cycle of a mosquito:

Stage A → Stage B → Stage C → Stage D (Adult)
(in water)  (in water)  (in water)   (in air)

(a) Name Stages A, B, and C. (b) Why is it important to clear stagnant water to prevent mosquito breeding?

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12. Compare the life cycles of a butterfly and a grasshopper by completing the table:

Feature	Butterfly	Grasshopper
Type of metamorphosis
Number of stages
Does it have a pupa stage?
What is the young called?

13. Explain the process of seed dispersal and state TWO reasons why it is important for plants.

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Section D: Structured Questions (5 marks each)

14. Study the diagram of a flower below:

        [Stigma]
           |
        [Style]
           |
        [Ovary with ovules]
    
    [Anther]---[Filament]
    
    [Petals surrounding]
    [Sepals at base]

(a) Identify the male and female parts of the flower. (2 marks)

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(b) Describe what happens during fertilisation in a flowering plant. (2 marks)

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(c) After fertilisation, what does the ovule develop into? (1 mark)

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15. A farmer noticed that there were fewer butterflies in his garden one year.

(a) Suggest TWO possible reasons for the decrease in butterfly population. (2 marks)

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(b) Explain how the decrease in butterflies might affect the plants in the garden. (2 marks)

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(c) What could the farmer do to attract more butterflies to his garden? (1 mark)

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Section E: Higher-Order Thinking (5 marks)

16. Study the information below:

Animal X:

• Lays eggs in water
• Young breathes through gills
• Adult breathes through lungs and moist skin
• Young looks different from adult

Animal Y:

• Gives birth to live young
• Young looks like a smaller version of adult
• Young feeds on mother's milk

(a) Identify what group of animals X and Y belong to. (2 marks)

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(b) Describe ONE advantage of Animal Y's method of reproduction compared to laying eggs. (1.5 marks)

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(c) Describe ONE advantage of laying many eggs (like Animal X does) compared to giving birth to live young. (1.5 marks)

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End of Quiz

TuitionGoWhere Primary School (AI)

Primary 5 Science - Life Cycles

Quiz 01 | Answer Key

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Section A: Multiple Choice Questions (2 marks each)

1. C) Egg → Larva → Pupa → Adult

This is the correct sequence for complete metamorphosis in butterflies

2. B) Incomplete metamorphosis

Cockroaches have 3 stages: egg → nymph → adult (no pupa stage)

3. C) Ovary

The ovary develops into the fruit after fertilisation

4. B) Anther to the stigma

Pollination is the transfer of pollen from anther (male part) to stigma (female part)

5. C) Chicken

Chickens undergo direct development - chicks look like miniature adults

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Section B: Fill in the Blanks (2 marks each)

6. tadpole → young frog (or froglet)

Frog life cycle: egg → tadpole → young frog → adult frog

7. pollination ; fertilisation

Pollination precedes fertilisation in plant reproduction

8. caterpillar ; larva

Both terms refer to the feeding stage of a butterfly

9. direct

Direct development means young resemble adults from birth

10. anther ; ovary

Anther produces pollen; ovary contains ovules

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Section C: Short Answer Questions (4 marks each)

11. (a) Stage A: Egg Stage B: Larva (wriggler) Stage C: Pupa (tumbler) (3 marks - 1 mark each)

(b) Mosquito eggs, larvae, and pupae all develop in stagnant water. By clearing stagnant water, we remove the breeding grounds for mosquitoes, breaking their life cycle and reducing their population. This helps prevent mosquito-borne diseases like dengue fever. (1 mark)

12.

Feature	Butterfly	Grasshopper
Type of metamorphosis	Complete	Incomplete
Number of stages	4	3
Does it have a pupa stage?	Yes	No
What is the young called?	Larva/Caterpillar	Nymph

(1 mark per correct row)

13. Seed dispersal is the process where seeds are carried away from the parent plant to other places.

Reasons why seed dispersal is important:

1. It reduces competition between the parent plant and the young plants for sunlight, water, and nutrients/space.
2. It allows plants to spread to new areas and colonise new habitats.
3. It prevents overcrowding of plants in one area.

(2 marks for explanation, 1 mark per reason)

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Section D: Structured Questions (5 marks each)

14. (a) Male parts: Anther and filament (stamen) Female parts: Stigma, style, and ovary (pistil) (1 mark each)

(b) During fertilisation:

• A pollen tube grows from the pollen grain on the stigma down through the style to the ovary
• The male sex cell travels down the pollen tube
• The male sex cell joins/fuses with the female sex cell (ovule) in the ovary
• This produces a fertilised egg that will develop into a seed (2 marks)

(c) The ovule develops into a seed. (1 mark)

15. (a) Possible reasons for decrease in butterfly population:

• Use of pesticides killing butterflies or caterpillars
• Loss of habitat/food plants for caterpillars
• Pollution in the area
• Climate changes affecting their breeding
• Increase in natural predators (1 mark each, any 2 reasons)

(b) The decrease in butterflies might affect plants because:

• Butterflies are pollinators
• Without butterflies to transfer pollen, fewer flowers will be pollinated
• This leads to fewer fruits and seeds being produced
• Plants may not be able to reproduce as successfully (2 marks)

(c) The farmer could:

• Plant flowers that attract butterflies (nectar plants)
• Avoid using pesticides
• Plant host plants for caterpillars
• Create a butterfly garden (1 mark, any 1 answer)

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Section E: Higher-Order Thinking (5 marks)

16. (a) Animal X: Amphibian (e.g., frog) Animal Y: Mammal (1 mark each)

(b) Advantage of giving birth to live young:

• The young develops inside the mother's body where it is protected from predators and harsh environmental conditions
• The young has a higher chance of survival as it is cared for by the mother
• The mother can provide milk/nutrition directly to the young (1.5 marks for well-explained answer)

(c) Advantage of laying many eggs:

• Even if some eggs are eaten by predators or do not survive, some will still hatch and develop into adults
• The parent does not need to spend energy caring for the young
• A large number of offspring can be produced at once, increasing chances of species survival (1.5 marks for well-explained answer)

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Marking Scheme

Section	Questions	Total Marks
A	1-5	10
B	6-10	10
C	11-13	12
D	14-15	10
E	16	5
Total		47

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End of Answer Key