Plants Survival

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Unit 2: Survival of The Species

Lesson 2: Plants Survival

Various ways of plants dispersal

Plants Disperse Their Seeds and Fruits

Four various types of plants dispersal:a.by wind b.by water c.by animals d.by explosive mechanism

Plants Disperse by Wind

Angsana

Dandelion Whirling Nut (Gyrocarpus)

Plants Disperse by Winda. 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 WatercoconutPong-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 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 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.

DISCUSSION OF ANSWERs

QUIZ TIME

QUESTION 11. State 4 various ways of plants disperse their seeds and fruits.

wind a. _________ water b. _________

animals c. ___________d.Explosive mechanism ___________

QUESTION 22. Which of the following plants disperse their seeds by wind?A. coconut B. pong pong C. angsana D. watermelon

QUESTION 33. Which of the following plants DO NOT disperse their seeds by wind?A. angsana B. balsam C. dandelion D. Whirling nut

QUESTION 44. Which of the following plants disperse their seeds by water?A. mango B. okra C. chili D. coconut

QUESTION 55. Which of the following plants DONOT disperse their seeds by animals? A. Rubber seeds B. mango C. watermelon D. papaya

QUESTION 66. Which of the following plantsdisperse their seeds by explosive mechanism? A. dandelion B. okra C. pong pong D. rambutan

QUESTION 77. Which of the following is the characteristicof the seeds dispersed by wind ?

A. Cover with waxy skin B. Air spaces inside the seeds C. Colourful seeds and fruits D. Small and light

QUESTION 88. Which of the following is the characteristicof the seeds dispersed by water ?A.Light and small B.Wing like structure C.Waxy skin and air spaces D.Good smells and colourful

QUESTION 99. Which of the following is the characteristicof the seeds dispersed by animals ?A.Light and small B.Good smells and colourful fruits C.Wing like structure D.Waxy skin and air spaces

QUESTION 1010. Which of the following is thecharacteristic of the seeds dispersed by explosive mechanism ? A.Colourful fruits B.Good smells C.Dry up and burst D.Waxy skin and air spaces

QUESTION 1111. Why plants need to disperse their seeds and fruits?A.To produce more fruits B.To make sure them eaten by animals C.To make sure them disperse far away D.To ensure the survival of plants species

WELL DONE

Summary

Dispersal Wind Water Animals Explosive mechanism

Plants Angsana, dandelion

Dispersal Wind Water Animals Explosive mechanism

Characteristic of seeds or fruits Small, light , fine hair, winglike Covered with waxy skin, air spaces Brightly coloured, fleshy, edible and smelly Dry up and burst

Coconut, pong pongMango, watermelon

Balsam, okra

Plants SurvivalReasons why plants need to disperse their seeds and fruits: 1. To ensure the survival of their species

HOMEWORK

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