Reproduction In Plants

P5/6 scienceReproduction In PlantsMethod Of DispersalFruit and seeds may be scattered (dispersed) in different ways depending on their environment andcharacteristics.1By Wind Characteristics- light and dry- may have wing-like structures so that the seeds / fruit can be easily carried away by thewindsangsana2shorealalangyellow flameBy Water Characteristics- has a fibrous husk that traps air, enabling it to float on water and be carried over longdistances- has a waterproof coveringscoconut3pong ponglotusnipahmangroveBy Animals Characteristics- may have hook-like structures which hook on to the fur of animals and drop off at anotherlocation- may have thick, juicy flesh which is eaten by animals, leaving the seed behind- some edible fruit may have small, indigestable seeds that are swallowed by animals and passedout in their waste laters edible fruitmangorambutanTaken from Science Partner: A Complete Guide To Upper Block Science Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-PublishersappleorangeSAPSCSP5&6 W02Page 1/8

P5/6 scienceReproduction In Plants fruit with hook-like structuresspikeletmimosa4love grassBy Explosive Action Characteristics- fruit split open forcefully (explosive action) when they are ripe, scattering the seedssbalsamcottonlady’s fingerrubbersagaflame of the forestThe African tulip fruit have pods that split open, but not forcefully enough for the seeds to bedispersed on their own. The seeds are small and light so that they can be carried away by thewind.Another example is the kapok.African tulip and seedTaken from Science Partner: A Complete Guide To Upper Block Science Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-PublisherskapokSAPSCSP5&6 W02Page 2/8

P5/6 scienceReproduction In Flowering Plants1.Study the flow chart shown below carefully.Floweringplants?NoReproduce by Yesspores?NoYesANoDReproduce byseeds?CYesBWhich letters, A, B, C or D, represent the flame of the forest and whisk fern respectively?2.Flame of the forestWhisk fern(1)AC(2)BC(3)BD(4)AD)()()What is/are the function(s) of the petals of a flower?A.B.C.D.The petals attract birds and insects which in turn pollinate the flower.The petals surround both the male and female reproductive organs.The petals hold the nectar to attract insects.The petals protect the ovules of the flower.(1) A only(2) A and B only3.((3) B and C only(4) A, B and D onlyStudy the diagram of the fruit shown below.kapok fruitWhat is/are the characteristic(s) of the fruit above?A. light and dryB. pod-likeC. have wings(1) A only(2) B onlyTaken from Nail Those MCQs! Primary Science upper Block 5/6 Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-Publishers(3) A and B only(4) A and C onlySAPSCSP5&6 W02Page 3/8

P5/6 scienceReproduction In Flowering Plants4.Elaine planted a seed and recorded the following records.Day 4Day 6Day 10Day 13Day 17On which day would the young plant most likely be able to make its own food?(1) Day 11(2) Day 125.(3) Day 13(4) Day 16()Look at the picture shown below.BCDAEFWhich letters, A, B, C, D, E or F, made up the parts of the male reproductive system of the flower?(3) A, B and E only(4) C, D and F only(2. 23. 34. 35. 1Taken from Nail Those MCQs! Primary Science upper Block 5/6 Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-Publishers)Answers: 1. 3(1) A and B only(2) B and C onlySAPSCSP5&6 W02Page 4/8

P5/6 scienceReproduction In PlantsGerminationIf a seed is scattered and lands at a place where it is able to obtain sufficient air, water and warmth, it willstart to grow and develop into a seedling. We call this germination.Germination is the process where a seed develops into a seedling.Roots start to grow downwards toanchor the new plant firmly in thesoil. The roots also absorb water andmineral salts from the soil.The seed leaves provide food tothe seedling because it cannotmake its own food.shootseedadult plantThe first leaves start to grow.The young plant can nowphotosynthesize and makefood for itself. The shoot willgrow towards the sunlight.The seedling continues to grow untilit finally becomes an adult plant. Theadult plant produces flowers whichwill later develop into fruit and seedswhen they are pollinated and fertilized. The cycle then continues.Cycle of a plantOther Methods Of Reproduction In PlantsNon-flowering plants, as the term implies, do not have flowers. Thus, they cannot reproduce seeds tomake new plants.Non-flowering plants reproduce in a different way.1By SporesNon-flowering plants such as ferns have tiny spore bags on the underside of their leaves. The spore bagsin these ferns contain numerous spores which are released by the plant. Some of the spores which landin places with suitable conditions (i.e. having sufficient air, water and warmth) will develop into newplants.spore bagsbird’s nest fernTaken from Science Partner: A Complete Guide To Upper Block Science Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-PublishersSAPSCSP5&6 W02Page 5/8

P5/6 scienceReproduction In PlantsAll ferns such as the bird’s nest fern, bracken fern, maidenhair fern, soft tree fern, ladder fern and log fernreproduce by spores. The arrangement of spore bags on the leaves of the ferns may differ from plant toplant.Mushrooms and other fungi also reproduce by spores, although they do not come under thecategory of plants.2By Underground Storage RootsThe roots of these plants are underground. The roots are swollen because the food made by the plant isstored in them, hence the name underground storage root. The roots can also grow into new plants.Some examples of underground storage roots are the tapioca, radish, carrot, sweet potato and taro.3By Underground StemThe underground stems of these plants store food. There are buds on them which can develop into newplants.Some examples of underground stems are yam, ginger, water chestnut, potato and onion.budspotato4By SuckersThe shoots of these plants grow upright from the base of the parent plant.Some examples of plants that reproduce by suckers are the banana plant, pineapple plant, heliconia,sugarcane and sealing wax palm.banana5pineappleheliconiasugarcanepygmy date palmBy LeavesThe shoots grow from the leaf of the parent plant. The new plant formed is identical to the parent plant.Taken from Science Partner: A Complete Guide To Upper Block Science Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-PublishersSAPSCSP5&6 W02Page 6/8

P5/6 scienceReproduction In Flowering Plants1.What must an adult plant do in order to increase its chances of having more healthy seedlings?(1)(2)(3)(4)2.Disperse its seeds as far as possibleReproduce as many seeds as possibleMake more food for the adult plantProvide more nutrients for the seed leaves)Joshua took two coconuts of similar size and mass. He removed the fibrous husk of one of the coconuts.He then placed both coconuts into a trough of water at the same time. He noticed that the coconutwithout the husk sunk to the bottom of the trough. What is the aim of Joshua’s experiment?(1)(2)(3)(4)3.(To find out if the fibrous husk causes the coconut to become heavierTo find out if the fibrous husk causes the coconut to float on waterTo find out if the fibrous husk absorbs waterTo find out if the fibrous husk affects the size of the fruit()()The development of a flowering plant shown below is not listed in the correct order.Stages of the developmentAGermination of the seedsBSeeds are dispersedCFertilization takes placeDPollinated by the beesEOvary develops into a fruit while ovules become seedsRearrange the stages correctly to show the development of a flowering plant.1st stage2nd stage3rd stage4th stage5th stage(1)ABECD(2)ADECB(3)DECAB(4)DCEBATaken from Nail Those MCQs! Primary Science upper Block 5/6 Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-PublishersSAPSCSP5&6 W02Page 7/8

P5/6 scienceReproduction In Flowering Plants4.Seedlings from a same plant are planted on two similar plots of land, Y and Z, with the same type ofsoil. The seedlings are given the same amount of water daily.Plot YPlot ZWhich of the following is most likely the aim of the experiment?(1)(2)(3)(4)5.To find out if the type of soil affects the growth of the seedlingsTo find out if the amount of water affects the growth of the seedlingsTo find out if the number of seedlings planted affects the growth of the seedlingsTo find out if the amount of warmth received affects the growth of the seedlings()()The diagrams below show a plot of land at two different times of the year.CCDDCC CCC C E DDCDDlakeEEEEDStart of yearlakeEDEDEEDEnd of yearWhich fruit are dispersed by wind and splitting respectively?D(2)DC(3)DE(4)EC5. 2Taken from Nail Those MCQs! Primary Science upper Block 5/6 Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com Facebook: Singapore-Asia-Publishers4. 3C3. 4(1)2. 2Dispersed by splittingAnswers: 1. 1Dispersed by windSAPSCSP5&6 W02Page 8/8

Non-flowering plants, as the term implies, do not have flowers. Thus, they cannot reproduce seeds to make new plants. Non-flowering plants reproduce in a different way. 1 By Spores: Non-flowering plants such as ferns have tiny spore