1 Why Do Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant?

Transcription

1 ame: ate: Consolidation Worksheet 1 Why o Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant? 1 Label the different parts of the flower as shown below 2012 lston Publishing House Pte Ltd Science SMRT Teacher s uide rade 5 77

2 2 The statements below describe various stages in the development of a flowering plant B C F H Fertilisation takes place in the flower The ovary develops into a fruit seed germinates when it receives air, warmth and water The adult plant bears flowers flower is pollinated by wind or animals The ovules develop into seeds The seedling grows into an adult plant The petals of the flower fall off Complete the sequence of the stages above by writing the letters in the boxes provided The first letter has been written for you C 78 dditional Teacher s Resources 2012 lston Publishing House Pte Ltd

3 ame: Consolidation Worksheet 2 ate: What s Seed ispersal? Complete the table below by filling in the blanks with suitable words Method of seed dispersal Characteristics of fruits/seeds and light Seeds are By wind Seeds may have -like structures or to help them stay afloat in the air longer outer covering Fruits have By water By splitting Fruits have them husks that trap air to help Fruits have pods which become dry and crack When ripe, the pod splits to throw the seeds out with a Seeds may be found in fruits that are and By animals 2012 lston Publishing House Pte Ltd Seeds may have, or stiff that can attach themselves to the fur of passing mammals Science SMRT Teacher s uide rade 5 79

4 ame: Fun and ames ate: Crossword Puzzle! Complete the crossword puzzle using the clues given below cross: 1 Fertilisation is the of a male reproductive cell with a female reproductive cell 4 typical seed is made up of an, seed leaves and a seed coat 6 The process in which a seed grows into a seedling is called 80 dditional Teacher s Resources 2012 lston Publishing House Pte Ltd

5 8 The carpel consists of the, style, ovary and ovule 9 Seeds dispersed by wind have wing-like structures or that help them stay afloat by the 10 Seeds of fleshy fruits that are too large to be swallowed may be animals that eat the fruits, away from their parents own: 2 The filament, anther and pollen grains make up the of the flower is the transfer of pollen grains from the anther of a flower to the stigma 3 of a flower of the same species 5 Most fruits dispersed by have fibrous husks which can trap air to enable them to stay afloat so the seedlings will not compete with the 7 Fruits and seeds must be parent plant and one another for sunlight, water, nutrients and space 2012 lston Publishing House Pte Ltd Science SMRT Teacher s uide rade 5 81

6 ame: ate: xam Practice Process skills: Observing, nalysing Plants X and Y grow next to each other butterfly visited a flower in Plant X and then a flower in Plant Y as shown below, before flying off Plant X Plant Y a Fill in the blanks below i The butterfly was most likely to transfer pollen grains from the flower in Plant to the flower in Plant [1 mark] ii This type of pollination is known as [1 mark] b ame two characteristics of plants that help in pollination by insects such as butterflies [2 marks] Hint: How do plants attract the insects? 82 dditional Teacher s Resources 2012 lston Publishing House Pte Ltd

7 2012 lston Publishing House Pte Ltd Science SMRT Teacher s uide rade ate: 1 Ovary Filament nther Pollen grain Petal Ovule Style nswers to dditional Teacher s Resources Stigma Label the different parts of the flower as shown below Why o Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant? Consolidation Worksheet ame: Fertilisation takes place in the flower The ovary develops into a fruit seed germinates when it receives air, warmth and water The adult plant bears flowers flower is pollinated by wind or animals The ovules develop into seeds The seedling grows into an adult plant The petals of the flower fall off C H F B The Life Cycle of Plants nswers to dditional Teacher s Resources Complete the sequence of the stages above by writing the letters in the boxes provided The first letter has been written for you B C F H 2 The statements below describe various stages in the development of a flowering plant

8 ate: dditional Teacher s Resources By animals By splitting By water By wind Method of seed dispersal small and light husks that trap air to help fleshy hooks, spines or stiff Seeds may have hairs that can attach themselves to the fur of passing mammals Seeds may be found in fruits that are and edible Fruits have pods which become dry and crack unevenly When ripe, the pod splits to throw the force seeds out with a Fruits have fibrous float them Fruits have waterproof outer covering wing -like structures or Seeds may have hairs to help them stay afloat in the air longer Seeds are Characteristics of fruits/seeds Complete the table below by filling in the blanks with suitable words 2 What s Seed ispersal? Consolidation Worksheet ame: nswers to dditional Teacher s Resources F U H M T S 6 M B S R P S S S O T L L O P T M Y R R C M R R T W 5 ate: cross: 1 Fertilisation is the of a male reproductive cell with a female reproductive cell, seed leaves and a seed coat 4 typical seed is made up of an 6 The process in which a seed grows into a seedling is called 1 O Crossword Puzzle! Complete the crossword puzzle using the clues given below Fun and ames ame: nswers to dditional Teacher s Resources Chapter lston Publishing House Pte Ltd

9 2012 lston Publishing House Pte Ltd Science SMRT Teacher s uide rade 5 85 nswers to dditional Teacher s Resources own: 2 The filament, anther and pollen grains make up the of the flower is the transfer of pollen grains from the anther of a flower to the stigma 3 of a flower of the same species have fibrous husks which can trap air to enable 5 Most fruits dispersed by them to stay afloat so the seedlings will not compete with the 7 Fruits and seeds must be parent plant and one another for sunlight, water, nutrients and space 8 The carpel consists of the, style, ovary and ovule that help them 9 Seeds dispersed by wind have wing-like structures or stay afloat by the 10 Seeds of fleshy fruits that are too large to be swallowed may be animals that eat the fruits, away from their parents ate: Plant Y 2 Scented flowers 1 Brightly-coloured flowers Hint: How do plants attract the insects? [1 mark] The Life Cycle of Plants nswers to dditional Teacher s Resources b ame two characteristics of plants that help in pollination by insects such as butterflies [2 marks] ii This type of pollination is known as cross-pollination i The butterfly was most likely to transfer pollen grains from the flower in Plant X to the flower in Plant Y [1 mark] a Fill in the blanks below Plant X Plants X and Y grow next to each other butterfly visited a flower in Plant X and then a flower in Plant Y as shown below, before flying off Process skills: Observing, nalysing xam Practice ame:

10 Chapter 1 lossary Chapter 1: nther The pollen-bearing part of a stamen Carpel Control The female organ of a flowering plant, consisting of the stigma, style, ovary and ovule n experimental set-up that mirrors the test experimental set-up except that nothing is changed, which is used to compare against Cross-pollination The transfer of pollen from the flower of one plant to the flower of another plant of the same species ispersal mbryo xplosive action Fertilisation Fibrous husk Filament Fuse ermination Hook Ovary Ovule Perfect flower Pollen grains Pollination Seed coat Seed leaves The scattering of seeds in different directions, far away from the parent plants The immature plant contained in the seed, which will grow into a new plant under the right conditions The forceful splitting of seed pods or capsules to throw the seeds far from the parent plant The fusing or union of a male reproductive cell witha female reproductive cell during sexual reproduction The dry external covering of certain fruits or seeds, made of fibres The stalk-like portion of a stamen, that supports the anther The uniting of a male reproductive cell with a female reproductive cell that occurs during fertilisation The development of roots and shoots from a seed curved piece of hard substance in seeds, for catching on the fur of passing mammals to help in seed dispersal The part below the style in plants, that contains and protects the ovules The plant part that contains the female reproductive part, which after fertilisation develops into a seed flower having both stamens and carpels The yellow, dusty substance found on the anther, which contains the male reproductive parts The transfer of pollen from the anther to the stigma The outer covering of a seed TThe part of the seed that contain a store of nutrients for the new plant that will grow from the embryo 86 lossary 2012 lston Publishing House Pte Ltd

11 Spine Splitting Self-pollination Stamen Stiff hair Stigma Style Wing-like structure stiff, sharp or pointed part in seeds, for catching on the fur of passing mammals to help in seed dispersal The forceful breaking open of seed pods or capsules to throw the seeds far from the parent plant The transfer of pollen from the anther to the stigma of the same flower, or another flower on the same plant The pollen-bearing male organ of a flowering plant, consisting of the filament and the anther Rigid spine-like part in seeds, for catching on the fur of passing mammals to help in seed dispersal The part of the female organ in plants above the style, that receives the pollen The slender part of the female organ of a plant that extends from the ovary to the stigma Part of a seed shaped like a wing, that helps the seed to keep afloat in the air longer to carry it farther away from the parent plant The Life Cycle of Plants 2012 lston Publishing House Pte Ltd Science SMRT Teacher s uide rade 5 87