Z Why Do Plants Reproduce? / What Happens in the Life ... · PDF fileWhy Do Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant? ... pollination by insects such

18

Fruit/Seed Diagram Description

BurdockThe fruits have ___________ that can cling onto

the fur of passing mammals.

Pea podThe fruit pods ___________ open with a force to

throw the seeds out.

Maple

The _________________ structures help keep

the seeds ________________ in the air for the

_________________ to carry it far away from the

parent plant.

Complete the table below to match the fruits/seeds with the diagrams that show how far the seeds are scattered from their parent plants. In addition, fill in the blanks to complete the description on how the fruits/seeds are scattered. [8 marks]

Chapter 1

wing-like

split

hooks

wind

afloat

Z

X

Y

Name: Class: Date:

The Life Cycle of Plants

Consolidation Worksheet 1Why Do Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant?1. Label the different parts of the flower as shown below.

© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 5 77

2. The statements below describe various stages in the development of a flowering plant.

A Fertilisation takes place in the flower. B The ovary develops into a fruit. C A seed germinates when it receives air, warmth and water. D The adult plant bears flowers. E A flower is pollinated by wind or animals. F The ovules develop into seeds. G The seedling grows into an adult plant. H 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

Name: Class: Date:


Consolidation Worksheet 2What Is Seed Dispersal?

Complete the table below by filling in the blanks with suitable words.

Method of seed dispersal Characteristics of fruits/seeds

By wind• Seedsare and light.

• Seedsmayhave -like structures or to help them stay afloat in the air longer.

By water• Fruitshave outer covering.

• Fruitshave husks that trap air to help them .

By splitting• Fruitshavepodswhichbecomedryandcrack

. When ripe, the pod splits to throw the seeds out with a .

By animals

• Seedsmaybefoundinfruitsthatare and .

• Seedsmayhave , or stiff that can attach themselves to the fur of

passing mammals.

78 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources

2. The statements below describe various stages in the development of a flowering plant.

A Fertilisation takes place in the flower. B The ovary develops into a fruit. C A seed germinates when it receives air, warmth and water. D The adult plant bears flowers. E A flower is pollinated by wind or animals. F The ovules develop into seeds. G The seedling grows into an adult plant. H 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

Name: Class: Date:


Consolidation Worksheet 2What Is Seed Dispersal?

Complete the table below by filling in the blanks with suitable words.

Method of seed dispersal Characteristics of fruits/seeds

By wind• Seedsare and light.

• Seedsmayhave -like structures or to help them stay afloat in the air longer.

By water• Fruitshave outer covering.

• Fruitshave husks that trap air to help them .

By splitting• Fruitshavepodswhichbecomedryandcrack

. When ripe, the pod splits to throw the seeds out with a .

By animals

• Seedsmaybefoundinfruitsthatare and .

• Seedsmayhave , or stiff that can attach themselves to the fur of

passing mammals.


8. The carpel consists of the , style, ovary and ovule.9. Seedsdispersedbywindhavewing-likestructuresor that help them

stay afloat.10.Seedsoffleshyfruitsthataretoolargetobeswallowedmaybe by the

animals that eat the fruits, away from their parents.

Down:2. The filament, anther and pollen grains make up the of the flower.3. is the transfer of pollen grains from the anther of a flower to the stigma

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.7. Fruits and seeds must be so the seedlings will not compete with the

parent plant and one another for sunlight, water, nutrients and space.

Name: Class: Date:

Fun and Games


1 2

3

4

5

6

7

8

9

10

Complete the crossword puzzle using the clues given below.

Across:1. Fertilisation is the of a male reproductive cell with a female reproductive

cell.4. A 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 .

Crossword Puzzle!


8. The carpel consists of the , style, ovary and ovule.9. Seedsdispersedbywindhavewing-likestructuresor that help them

stay afloat.10.Seedsoffleshyfruitsthataretoolargetobeswallowedmaybe by the

animals that eat the fruits, away from their parents.

Down:2. The filament, anther and pollen grains make up the of the flower.3. is the transfer of pollen grains from the anther of a flower to the stigma

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.7. Fruits and seeds must be so the seedlings will not compete with the

parent plant and one another for sunlight, water, nutrients and space.

Name: Class: Date:

Fun and Games


1 2

3

4

5

6

7

8

9

10

Complete the crossword puzzle using the clues given below.

Across:1. Fertilisation is the of a male reproductive cell with a female reproductive

cell.4. A 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 .

Crossword Puzzle!


Name: Class: Date:

Exam Practice


Process skills: Observing, Analysing

Plants X and Y grow next to each other. A butterfly visited a flower in Plant X and then a flower in Plant Y as shown below, before flying off.

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. Name two characteristics of plants that help in pollination by insects such as butterflies. [2 marks]

Hint:How do plants attract the

insects?

Plant X Plant Y


Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

Name: Class: Date:

Exam Practice


Process skills: Observing, Analysing

Plants X and Y grow next to each other. A butterfly visited a flower in Plant X and then a flower in Plant Y as shown below, before flying off.

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. Name two characteristics of plants that help in pollination by insects such as butterflies. [2 marks]

Hint:How do plants attract the

insects?

Plant X Plant Y

2.

The

stat

emen

ts b

elow

des

crib

e va

rious

sta

ges

in th

e de

velo

pmen

t of a

flo

wer

ing

plan

t.

A

Fe

rtilis

atio

n ta

kes

plac

e in

the

flow

er.

B

The

ovar

y de

velo

ps in

to a

frui

t.

C

A s

eed

germ

inat

es w

hen

it re

ceiv

es a

ir, w

arm

th a

nd w

ater

.

D

The

adul

t pla

nt b

ears

flow

ers.

E

A fl

ower

is p

ollin

ated

by

win

d or

ani

mal

s.

F Th

e ov

ules

dev

elop

into

see

ds.

G

Th

e se

edlin

g gr

ows

into

an

adul

t pla

nt.

H

The

peta

ls of

the

flow

er fa

ll of

f.

C

ompl

ete

the

sequ

ence

of t

he s

tage

s ab

ove

by w

ritin

g th

e le

tters

in th

e bo

xes

prov

ided

. The

firs

t let

ter

has

been

writ

ten

for

you.

CG

DE

AH

FB

Nam

e:

C

lass

:

Dat

e:

Th

e L

ife

Cy

cle

of

Pla

nts

Co

nso

lid

atio

n W

ork

shee

t 1W

hy D

o P

lants

Rep

rod

uce

? /

Wha

t H

ap

pen

s in

the

Life

Cycl

e of

a F

low

erin

g P

lant?

1.

Labe

l the

diff

eren

t par

ts o

f the

flow

er a

s sh

own

belo

w.

Polle

n gr

ain

Filam

ent

Stig

ma

Ovu

le

Ant

her O

vary

Styl

e

Peta

l


The

Life

Cyc

leo

f P

lan

ts

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

Nam

e:

C

lass

:

Dat

e:

Fu

n a

nd

G

ames

Th

e L

ife

Cy

cle

of

Pla

nts

12

3

4

5

6

7 8

9

10

Com

plet

e th

e cr

ossw

ord

puzz

le u

sing

the

clue

s gi

ven

belo

w.

Acr

oss:

1. Fe

rtilis

atio

n is

the

of a

mal

e re

prod

uctiv

e ce

ll with

a fe

mal

e re

prod

uctiv

e ce

ll.4.

A

typi

cal s

eed

is m

ade

up o

f an

, see

d le

aves

and

a s

eed

coat

.6.

Th

e pr

oces

s in

whi

ch a

see

d gr

ows

into

a s

eedl

ing

is ca

lled

.

Cro

ssw

ord

Pu

zzle

!

FS

N

T A MP NL T

I

W E

L I SD

S RA

S E D

T SI

H

I

G CE

M AD

A RA R

EB E

A

Y MI

M GN

R RT

O AD

I OP

NE

ON

N

UI

G

Nam

e:

C

lass

:

Dat

e:

Th

e L

ife

Cy

cle

of

Pla

nts

Co

nso

lid

atio

n W

ork

shee

t 2W

ha

t Is

See

d D

isp

ersa

l?

Com

plet

e th

e ta

ble

belo

w b

y fil

ling

in th

e bl

anks

with

sui

tabl

e w

ords

.

Met

hod

of s

eed

disp

ersa

lC

hara

cter

istic

s of

fru

its/s

eeds

By w

ind

•Se

edsare

and

ligh

t.

•Se

edsmay

hav

e-li

ke s

truc

ture

s or

to

hel

p th

em s

tay

aflo

at in

the

air

long

er.

By w

ater

•Fruitshav

e o

uter

cov

erin

g.

•Fruitshav

e h

usks

that

trap

air

to h

elp

them

.

By s

plitt

ing

•Fruitshav

epo

dsw

hich

bec

omedryan

dcrac

k. W

hen

ripe,

the

pod

split

s to

thro

w th

e se

eds

out w

ith a

.

By a

nim

als

•Se

edsmay

befoun

dinfr

uitsth

atare

an

d .

•Se

edsmay

hav

e,

or

stiff

th

at c

an a

ttach

them

selv

es to

the

fur

of

pass

ing

mam

mal

s.

smal

l

win

gha

irs

wat

erpr

oof

fibro

us

unev

enly

flesh

y

hook

ssp

ines

hairsed

ible

forc

e

float


Ch

ap

ter 1

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

Nam

e:

C

lass

:

Dat

e:

Ex

am P

ract

ice

Th

e L

ife

Cy

cle

of

Pla

nts

Pro

cess

sk

ills

: Obs

ervi

ng, A

naly

sing

Plan

ts X

and

Y g

row

nex

t to

each

oth

er. A

but

terf

ly v

isite

d a

flow

er in

Pla

nt X

and

th

en a

flow

er in

Pla

nt Y

as

show

n be

low

, bef

ore

flyin

g of

f.

a.

Fill i

n th

e bl

anks

bel

ow.

i.

The

butte

rfly

was

mos

t like

ly to

tran

sfer

pol

len

grai

ns fr

om th

e flo

wer

in

Plan

t to

the

flow

er in

Pla

nt

.

[1

mar

k]

ii.

This

type

of p

ollin

atio

n is

know

n as

.

[1 m

ark]

b.

Nam

e tw

o ch

arac

teris

tics

of p

lant

s th

at h

elp

in

po

llinat

ion

by in

sect

s su

ch a

s bu

tterf

lies.

[2 m

arks

]

Hin

t:H

ow d

o pl

ants

att

ract

the

in

sect

s?

Plan

t XPl

ant Y

XY

cros

s-po

llinat

ion

1. Br

ight

ly-c

olou

red

flow

ers

2. S

cent

ed fl

ower

s

8.

The

carp

el c

onsis

ts o

f the

, s

tyle

, ova

ry a

nd o

vule

.9.

Se

eds

disp

erse

d by

win

d ha

ve w

ing-

like

stru

ctur

es o

r th

at h

elp

them

st

ay a

float

.10

. Se

eds

of fl

eshy

frui

ts th

at a

re to

o la

rge

to b

e sw

allo

wed

may

be

by

the

anim

als

that

eat

the

frui

ts, a

way

from

thei

r pa

rent

s.

Dow

n:2.

Th

e fil

amen

t, an

ther

and

pol

len

grai

ns m

ake

up th

e o

f the

flow

er.

3.

is th

e tr

ansf

er o

f pol

len

grai

ns fr

om th

e an

ther

of a

flow

er to

the

stig

ma

of a

flow

er o

f the

sam

e sp

ecie

s.5.

M

ost f

ruits

disp

erse

d by

h

ave

fibro

us h

usks

whi

ch c

an tr

ap a

ir to

ena

ble

them

to s

tay

aflo

at.

7.

Frui

ts a

nd s

eeds

mus

t be

so

the

seed

lings

will

not c

ompe

te w

ith th

e pa

rent

pla

nt a

nd o

ne a

noth

er fo

r su

nlig

ht, w

ater

, nut

rient

s an

d sp

ace.


The

Life

Cyc

leo

f P

lan

ts

Glossary

GlossaryChapter 1: The Life Cycle of Plants

Anther The pollen-bearing part of a stamen

Carpel Thefemaleorganofafloweringplant,consistingofthestigma,style,ovaryandovule

Control Anexperimentalset-upthatmirrorsthetestexperimentalset-upexceptthatnothingischanged,whichisusedtocompareagainst

Cross-pollination Thetransferofpollenfromtheflowerofoneplanttotheflowerofanotherplantofthesamespecies

Dispersal Thescatteringofseedsindifferentdirections,farawayfromtheparentplants

Embryo Theimmatureplantcontainedintheseed,whichwillgrowintoanewplantundertherightconditions

Explosive action Theforcefulsplittingofseedpodsorcapsulestothrowtheseedsfarfrom the parent plant

Fertilisation Thefusingorunionofamalereproductivecellwithafemalereproductivecellduringsexualreproduction

Fibrous husk Thedryexternalcoveringofcertainfruitsorseeds,madeoffibres

Filament Thestalk-likeportionofastamen,thatsupportstheanther

Fuse Theunitingofamalereproductivecellwithafemalereproductivecellthatoccursduringfertilisation

Germination Thedevelopmentofrootsandshootsfromaseed

Hook Acurvedpieceofhardsubstanceinseeds,forcatchingonthefurofpassingmammalstohelpinseeddispersal

Ovary Thepartbelowthestyleinplants,thatcontainsandprotectstheovules

Ovule Theplantpartthatcontainsthefemalereproductivepart,whichafterfertilisationdevelopsintoaseed

Perfect flower Aflowerhavingbothstamensandcarpels

Pollen grains Theyellow,dustysubstancefoundontheanther,whichcontainsthemalereproductiveparts

Pollination The transfer of pollen from the anther to the stigma

Seed coat Theoutercoveringofaseed

Seed leaves TThepartoftheseedthatcontainastoreofnutrientsforthenewplantthatwillgrowfromtheembryo

86 © 2012 Alston Publishing House Pte Ltd

Ch

ap

ter 1

Spine Astiff,sharporpointedpartinseeds,forcatchingonthefurofpassingmammalstohelpinseeddispersal

Splitting Theforcefulbreakingopenofseedpodsorcapsulestothrowtheseedsfar from the parent plant

Self-pollination Thetransferofpollenfromtheanthertothestigmaofthesameflower,oranotherfloweronthesameplant

Stamen Thepollen-bearingmaleorganofafloweringplant,consistingofthefilamentandtheanther

Stiff hair Rigidspine-likepartinseeds,forcatchingonthefurofpassingmammalstohelpinseeddispersal

Stigma Thepartofthefemaleorganinplantsabovethestyle,thatreceivesthepollen

Style Theslenderpartofthefemaleorganofaplantthatextendsfromtheovarytothestigma

Wing-like Partofaseedshapedlikeawing,thathelpstheseedtokeepafloatstructure intheairlongertocarryitfartherawayfromtheparentplant


The

Life

Cyc

leo

f P

lan

ts

Documents

Z Why Do Plants Reproduce? / What Happens in the Life ... · PDF fileWhy Do Plants Reproduce? / What Happens in the Life Cycle of a Flowering Plant? ... pollination by insects such