plants survival
TRANSCRIPT
Unit 2: Survival of The Species
Unit 2: Survival of The Species
Lesson 2:Plants
Survival
Lesson 2:Plants
Survival
Various ways of plants
dispersal
Various ways of plants
dispersal
Plants Disperse Their Seeds and Fruits
Plants Disperse Their Seeds and Fruits
Four various types of plants dispersal:
a.by windb.by waterc.by animalsd.by explosive mechanism
Plants Disperse by WindPlants Disperse by Wind
Angsana
Dandelion
Whirling Nut (Gyrocarpus)
Plants Disperse by WindPlants Disperse by Wind
a. These seeds and fruits are disperse by wind
b. They are small, light, dry and have wing-like structure or fine hair.
c. These characteristics help them to be flown far away easily.
Plants Disperse by WaterPlants Disperse by Water
coconut
Pong-pong
a. These fruits are disperse by water. b. They are covered with waxy skin to prevent
water from being entering the fruit.
c. Air spaces in the husk help the fruit to
float.
Plants Disperse by AnimalsPlants Disperse by Animals
a. These seeds and fruits are disperse by animals.
b. Most of these fruits are brightly coloured, fleshy, edible and have smells.
c. The seed are usually hard.
Plants Disperse by Explosive MechanismPlants Disperse by
Explosive Mechanism
a. These fruits disperse their seeds by explosive mechanism.
b. They dry up and burst to push the seeds out from the fruits.
Why plants need to disperse their seeds and fruits ?
• Dispersal of seeds and fruits help to scatter them far away from the parent plants.
• This helps to ensure the survival of plant species.
• Dispersal of seeds and fruits help to scatter them far away from the parent plants.
• This helps to ensure the survival of plant species.
DISCUSSION OF
ANSWERs
DISCUSSION OF
ANSWERs
QUIZTIMEQUIZTIME
QUESTION 1
1. State 4 various ways of plants disperse their seeds and fruits.
a._________ c. ___________
b._________ d. ___________
wind
water
animals
Explosive mechanism
QUESTION 2
2. Which of the following plants disperse their seeds by wind?
A.coconutB.pong pongC.angsanaD.watermelon
QUESTION 3
3. Which of the following plants DO NOT disperse their seeds by wind?
A.angsanaB.balsamC.dandelionD.Whirling nut
QUESTION 4
4. Which of the following plants disperse their seeds by water?
A.mangoB.okraC.chiliD.coconut
QUESTION 5
5. Which of the following plants DO NOT disperse their seeds by animals?
A.Rubber seedsB.mangoC.watermelonD.papaya
QUESTION 6
6. Which of the following plants disperse their seeds by explosive mechanism?
A.dandelionB.okraC.pong pongD.rambutan
QUESTION 7
7. Which of the following is the characteristic of the seeds dispersed by wind ?
A.Cover with waxy skinB.Air spaces inside the seedsC.Colourful seeds and fruitsD.Small and light
QUESTION 8
8. Which of the following is the characteristic of the seeds dispersed by water ?
A.Light and smallB.Wing like structureC.Waxy skin and air spacesD.Good smells and colourful
QUESTION 9
9. Which of the following is the characteristic of the seeds dispersed by animals ?
A.Light and smallB.Good smells and colourful fruitsC.Wing like structureD.Waxy skin and air spaces
QUESTION 10
10. Which of the following is the characteristic of the seeds dispersed by explosive mechanism ?
A.Colourful fruitsB.Good smellsC.Dry up and burstD.Waxy skin and air spaces
QUESTION 11
11. Why plants need to disperse their seeds and fruits?
A.To produce more fruitsB.To make sure them eaten by animalsC.To make sure them disperse far awayD.To ensure the survival of plants
species
WELL DONE
Summary
Plants SurvivalPlants
Survival
Reasons why plants need to disperse their seeds and fruits:1.To ensure the survival of their species
Reasons why plants need to disperse their seeds and fruits:1.To ensure the survival of their species
DispersalCharacteristic of seeds or fruits
Wind
Water
Animals
Explosive mechanism
Small, light , fine hair, wing-like
Covered with waxy skin, air spacesBrightly coloured, fleshy, edible and smelly
Dry up and burst
Dispersal Plants
WindAngsana, dandelion
WaterCoconut, pong
pong
AnimalsMango,
watermelon
Explosive mechanism
Balsam, okra
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