Chapter 8

Question 1

What are the two types of reproduction in plants?

Answer 1

Asexual and sexual reproduction

Asexual reproduction involves producing offspring without seeds, while sexual reproduction involves the reproductive parts of plants.

Question 2

What is the function of flowers in reproduction?

Answer 2

Flowers perform the function of reproduction

Flowers are essential for sexual reproduction in flowering plants.

Question 3

What are the parts of a plant that are involved in vegetative propagation?

Answer 3

Roots, stems, leaves, and buds

Vegetative propagation is a type of asexual reproduction.

Question 4

Fill in the blank: In asexual reproduction, new plants are obtained without production of _______.

Answer 4

seeds

Question 5

What is vegetative propagation?

Answer 5

A type of asexual reproduction where new plants are produced from vegetative parts of the plant

This includes roots, stems, leaves, and buds.

Question 6

True or False: All plants reproduce only through seeds.

Answer 6

False

Some plants can reproduce asexually without seeds.

Question 7

What do seeds do after germination?

Answer 7

Form new plants

Seeds are essential for the growth of new plants.

Question 8

What period of growth do most plants undergo before flowering?

Answer 8

A vegetative period

During this time, plants develop roots, stems, and leaves.

Question 9

What is the typical seasonal occurrence for mango trees to flower?

Answer 9

Spring

Question 10

What is the process of observing the growth of roots from a cutting called?

Answer 10

Rooting observation

This involves monitoring the days taken for roots to emerge after burying a cutting in soil.

Question 11

What are the two types of reproduction in plants?

Answer 11

Asexual and sexual reproduction

Asexual reproduction involves producing offspring without seeds, while sexual reproduction involves the reproductive parts of plants.

Question 12

What is the function of flowers in reproduction?

Answer 12

Flowers perform the function of reproduction

Flowers are essential for sexual reproduction in flowering plants.

Question 13

What are the parts of a plant that are involved in vegetative propagation?

Answer 13

Roots, stems, leaves, and buds

Vegetative propagation is a type of asexual reproduction.

Question 14

Fill in the blank: In asexual reproduction, new plants are obtained without production of _______.

Answer 14

seeds

Question 15

What is vegetative propagation?

Answer 15

A type of asexual reproduction where new plants are produced from vegetative parts of the plant

This includes roots, stems, leaves, and buds.

Question 16

True or False: All plants reproduce only through seeds.

Answer 16

False

Some plants can reproduce asexually without seeds.

Question 17

What do seeds do after germination?

Answer 17

Form new plants

Seeds are essential for the growth of new plants.

Question 18

What period of growth do most plants undergo before flowering?

Answer 18

A vegetative period

During this time, plants develop roots, stems, and leaves.

Question 19

What is the typical seasonal occurrence for mango trees to flower?

Answer 19

Spring

Question 20

What is the process of observing the growth of roots from a cutting called?

Answer 20

Rooting observation

This involves monitoring the days taken for roots to emerge after burying a cutting in soil.

Question 21

In Class VI, what was learned about modes of reproduction in plants?

Answer 21

Different modes of reproduction exist, including asexual and sexual reproduction.

Question 22

new. leaves to arise. Try the same activity

Question 23

hy growing money plant in a jar of water

Question 24

nd record your observations.

Question 25

Node

Question 26

Bud in

Question 27

the axil

Question 28

Fig. 8.1 Stem-cutting of rose

Question 29

You must have seen flower buds

Question 30

developing into flowers. Apart from

Question 31

flower buds

Answer 31

there are buds in the axil

Question 32

(point of attachment of the leaf at the

Question 33

node) of leaves which develop into

Question 34

shoots. These buds are called vegetative

Question 35

buds (Fig. 8.2). A bud consists of a

Question 36

short stem around which immature

Question 37

overlapping leaves are present. Vegetative

Question 38

buds can also give rise to new plants.

Question 39

Activity 8.2

Question 40

Take a fresh potato. Observe the scars

Question 41

on it with the help of a magnifying glass.

Question 42

You may find bud(s) in them. These scars

Question 43

are also called eyes". Cut the potato

Question 44

into small portions

Answer 44

each with an eye

Question 45

and bury them in the soil. Water the

Question 46

Galaxy Tab S6 Lite

Question 47

pieces regularly for a few days and

Question 48

observe their progress. What do you find?

Question 49

Fig. 8.2 Potato plant sprouting from an 'eye'

Question 50

Likewise you can also grow ginger

Question 51

(Fig. 8.3) or turmeric.

Question 52

Bryophyllum (sprout leaf plant) has

Question 53

buds in the margins of leaves (Fig. 8.4 ).

Question 54

If a leaf of this plant falls on a moist

Question 55

Fig. 8.3 Ginger with new plants sprouting

Question 56

from it

Question 57

soil

Answer 57

each bud can gjve rise to a new

Question 58

plant.

Question 59

Roots of some plants can also give

Question 60

rise to new plants. Sweet potato and

Question 61

dahlia are examples.

Question 62

Plants such as cacti prOduce new

Question 63

plants when their parts get detached

Question 65

ScIENC

Question 66

RarRODUCTION IN PLANTS

Question 67

85

Question 68

4

Question 69

reproduce?

Question 70

organism

Answer 70

Let us 5ee how they

Question 71

tienits are made avallable to them.

Question 72

Remember that yeast 1s a single-celled

Question 73

(You might have Seen slímy green

Question 74

water bodíes. These are the algae. When

Question 75

patches in ponds

Answer 75

or in other stagnant

Question 76

infungus

Question 77

Fig.

Question 78

8.7 Reproduction through spore formation

Question 79

Galaxy Tab S6 Lite

Question 80

Fragmentation

Question 81

multiply every Sew hours 1f suffcient

Question 82

under a microscope. Thcse grow and

Question 83

organisns like yeast can be see) only

Question 84

You have already learmt about the tíny

Question 85

(Fig. 8.9).

Question 86

and pistil is the female reproductive part)

Question 87

Stamens are the male reproductive part

Question 88

the reproductive parts of a plant.

Question 89

a flower. You know that the flowers are

Question 90

You have learnt earlier the structure of

Question 91

Hypha

Question 92

Budding

Question 93

short tíne.

Question 94

TIumber of yeast cells are produced in a

Question 95

buds. If this process continues

Answer 95

a large

Question 96

arlses fron the bud forTning a chain of

Question 97

yeast cells. Sormnetines

Answer 97

another bud

Question 98

cell growS

Answer 98

matures and produces nore

Question 99

forms a new yeast cell. The new yeast

Question 100

gets detached frorn the parept cell and

Question 101

a bud. The bud gradually grows and

Question 102

Coning out íron the yeast cell Is called

Question 103

KThe small bulb-like projection

Question 104

8.2 SEXUAL REPRODUCTION

Question 105

od sezual reyroduction.

Question 106

Jarets. Parits prdue seeds as a result

Question 107

Fepructin have characters of toth the

Question 108

that plants produced by seZual

Question 109

Later in this chapter you will learn

Question 110

they are produced from a singe parent

Question 111

are erat cupies f the parent plarit

Answer 111

as

Question 112

producet fron sesds

Answer 112

The new plants

Question 113

bar oaers and fruits aer than thse

Question 114

prpattim take less tirne to grow and

Question 115

produced by vegetative

Question 116

Spores

Question 117

Flg. 8.5 Reprhalon in yeast by budding

Question 118

Sporanglum

Question 119

are released they keep floating in the

Question 120

1ke mesh on the bread. When spores

Question 121

1.2. ObServe the spores in the cotton-

Question 122

are present in the air. Repeat Activity

Question 123

an a bread piece grow from spores which

Question 124

In Chapter 1 you learnt that the fungi

Question 125

Spore formation

Question 126

means of spores.

Question 127

ferns (Fig. 8.8) also reproduce by

Question 128

individual. Plants such as moss and

Question 129

germinates and develops into a new

Question 130

favourable conditions

Question 131

they can survive for a long time. Under

Question 132

temperature and low humidity. So

Question 133

unfavourable conditions such as high

Question 134

hard protectíve coat to

Question 135

withstand

Question 136

bodies. Each spore is covered by a

Question 137

(Spores are asexual reproductive

Question 138

a spore

Question 139

(Plants

Question 140

Fia. 86 Frognnertatlomin sprogyra lar alga

Question 141

long distances.

Question 142

air. As they are very light

Question 143

they can cover

Question 144

Vegrtase propegation.

Question 145

there is ay advartage of

Question 146

infem

Question 147

Fig. 8.8 Reproductiorn through spore formation

Question 148

Deveioping

Question 149

bud

Question 150

1ew bud

Question 151

Chain bads

Question 152

plar

Question 153

detached part can gw into a new

Question 154

frons chbe main plant body. Each

Question 155

(Fig 8.5).

Question 156

may see the forInalion of new yeast ce

Question 157

microscope. What do you observe Yo

Question 158

on a ass slide and oSeTVE under

Question 159

After an hour. put a drop of this iq

Question 160

bodies)

Question 161

Sori

Question 162

Spore fomng

Question 163

Keep it ín the warm part of a ro

Question 164

spoonul of sugar and shake to diss

Question 165

contalner with some water. Aga

Question 166

Take a pinch yeast and place it

Question 167

of time.

Question 168

hCOver a large area in a short period

Question 169

e 86). This process coTtirues and

Question 170

poder fron a bakery ora

Question 171

chenlt st

Question 172

a

Question 173

Take plece of yeast cake

Question 174

(To be demonstrated by

Question 175

oK plecCes gro nto new individuals

Question 176

omore iragments. These fragmeIts

Question 177

tagneiatom. An alga breaks up into

Question 178

eroand multiply rapidly by

Question 179

ta nd uterits are avalable algae