Life Cycles P4

Question 1

Types of Life Cycles

Answer 1

1. Three-Stage Life Cycles (eg Chickens, Grasshoppers, Cockroaches): Egg, Young, Adult
2. Four-Stage Life Cycles (eg Butterflies, Mosquitoes): Egg, Larva, Pupa, Adult

Question 2

Grasshopper Life Cycle

Answer 2

1. Egg: Laid in the soil
2. Nymph: Moults several times as it grows. Look like adult but smaller with no wings
3. Adult: Has wings and can fly

Question 3

Butterfly Life Cycle

Answer 3

1. Egg: Usually lasts from 3 to 10 days
2. Larva/Caterpillar: Feeds on leaves for 3 to 6 weeks. Also moults several times
3. Pupa/Chrysalis: Undergoes metamorphosis that can last from days to months
4. Adult Butterfly: Feeds on nectar from flowers. Important pollinators

Question 4

Mosquito Life Cycle

Answer 4

1. Egg: Laid in Water
2. Larva: Called a Wriggler and lives in water, Moults several times as it grows
3. Pupa: Lives near water surface and breathes air
4. Adult

Question 5

Flowering Plant Life Cycles

Answer 5

1. Germination of Seeds
   - Requires Water, Oxygen and Warmth (WOW)
2. Roots grow out first downward into the soil
3. Shoot grows out next upwards out of the soil
4. Young plant depends on seed leaves for food before first leaves grow out
5. Cycle repeats itself after pollination and fertilisation of flowers