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Uses of angiosperms - class-XI

Description: uses of angiosperms
Number of Questions: 75
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Tags: kingdom plantae plant kingdom economic importance of plants and animals plants in daily life biology
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A cultivated plant whose seed epidermis produces abundant cellulosic hairs used in textile industry and manufacture of fine quality paper is

  1. Cannabis sativa

  2. Linum usitatissimum

  3. Gossypium herbaceum

  4. Salmalia malabarica


Correct Option: C

The expansion of CIMAP is

  1. Central Indigenous Medicinal and Aromatic Plants

  2. Central Institute of Medicinal and Semi-arid crop Plants

  3. Central Institute of Medicinal and Aromatic Plants

  4. None of the above


Correct Option: A
Explanation:

Central Institute of Medicinal and Aromatic Plants is a research institute of Council of Scientific and Industrial Research with its headquarter in Lucknow. It is engaged in the field of science and business of medicinal and aromatic plants. So the correct option is A. (Central Indigenous Medicinal and Aromatic Plants )

Bamboo grows in

  1. Temperate evergreen forests

  2. Tropical rain forests

  3. Deciduous forests

  4. Dry deciduous forests


Correct Option: B

Stamen of an angiospermic plant is equivalent to?

  1. Microsporangia

  2. Microspore

  3. Megasporophyll

  4. Microsporophyll


Correct Option: A

Which state in India is the largest producer of cotton

  1. Uttar Pradesh

  2. Madras

  3. Rajasthan

  4. Gujarat


Correct Option: D

Matunga, Bombay has one of the following institutes

  1. Industrial Toxicology Research Laboratory

  2. Cotton Technology Research Laboratory

  3. National Institute of Oceanography

  4. Llyod Botanical Garden


Correct Option: B

Following arrangement is correct from the point of view of decreasing biodiversity in angiosperms (N), fungi (F), pteridophytes (P) and algae (A).

  1. N $>$ F $>$ P $>$ A

  2. N $>$ F $>$ A $>$ P

  3. F $>$ N $>$ P $>$ A

  4. F $>$ N $>$ A $>$ P


Correct Option: B
Explanation:
Biodiversity means the diversity of species of genetic variation within one species and of ecosystem angiosperms have the ability to live animals into transporting their pollen and seeds. Fungi, unlike plants and pteridophytes, are vascular plants that produce neither flowers nor seeds. Algae cannot synthesize their food and need an external source of nutrients. The order of decreasing biodiversity is N>F >A>P. Hence, the correct answer is option B,  N>F >A>P.

Function of embryonal suspensor in angiosperms is to?

  1. Serve as channel for $H _2O$

  2. Push embryo deeper into endosperm

  3. Release growth hormone's

  4. Transfer nutrients from parent sporophyte to young embryo


Correct Option: A

Wax is obtained from

  1. Jojoba

  2. Guayle

  3. Leucaena

  4. Subabul


Correct Option: A
Explanation:

Jojoba is a plant that is grown commercially to produce jojoba oil. It is a liquid wax ester that is extracted from its seed.

So the correct option is A.

Who is author of book "Introduction to the Embryology" of Angiosperms?

  1. Maheshwari

  2. Birbal Sahni

  3. T.S. Mahabale

  4. J.S. Singh


Correct Option: A
Explanation:
Panchanan Maheshwari is the author of the book "Introduction to Embryology"
So, the correct answer is 'Maheshwari'

Glycerine is obtained from

  1. Bagasse

  2. Molasse

  3. Filter mud

  4. All the above


Correct Option: B
Explanation:

Glycerine can be manufactured by the alcoholic fermentation of molasses.

So the correct option is B

Important use of which of the following is as a lubricant

  1. Helianthus annuus

  2. Carthamus tinctorious

  3. Ricinus communis

  4. Cocos nucifera


Correct Option: C
Explanation:

Castor oil (Ricinus communis) has a number of medicinal, industrial and pharmaceutical uses. It's commonly used as an additive in foods, medications and skin care products and as an industrial lubricant, biodiesel fuel component, etc.

So the correct option is C.

In angiosperms the pollen grain is normally pollinated at ____________.

  1. One cell stage

  2. Two celled stage

  3. Three celled stage

  4. Four celled stage


Correct Option: B
Explanation:
Pollen grains are shed at two-celled condition (a vegetative cell and a generative cell). In such plants, the generative cell divides and forms the two male gametes during the growth of pollen tube in the stigma.
So, the correct answer is 'Two celled stage'

Petroleum plant is

  1. Euphorbia lathyrus

  2. Brickellia sp

  3. Albizia

  4. Both (a) and (b)


Correct Option: D
Explanation:

Petroleum plants belongs to the families Euphorbiaceae

(e.g., Euphorbia Lathyrus), Asclepiadaceae (e.g., Calotropis procera),

Leguminoseae (e.g., Copaifera langsdorfii) asteraceae (e. g. , Brickellia sp), etc.

So the correct option is D.

Ferula asafoetida is obtained from

  1. Roots

  2. Leaves

  3. Stern

  4. Flower


Correct Option: A
Explanation:

Ferula asafoetida which is also known as hing is a gum oleoresin extracted from the roots of the plant.

So the correct option is A.

Hevea yields

  1. Bast resin (latex)

  2. Soft fibre

  3. Delicious soft drink

  4. Strong fibre


Correct Option: A
Explanation:

Hevea brasiliensis is a rubber tree that produces latex in their specialized cells called laticifers which is present within the bark of the tree. 

So the correct option is A.

Bagasse is related to the manufacture of

  1. Canesugar

  2. Cellulose

  3. Cinchonidine

  4. Resin


Correct Option: A
Explanation:

Bagasse is the dry fibrous residue that remains after the crushing of sugarcane or sorghum stalks to extract their juice. 

So the correct option is A.

Which state in India is the largest producer of sugarcane

  1. Bihar

  2. Andhra Pradesh

  3. Punjab

  4. Uttar Pradesh


Correct Option: D
Explanation:

Uttar Pradesh has the largest area almost 50 percent of the sugarcane production area in India and it is followed by Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Gujarat, Bihar, Haryana and Punjab.

So the correct option is D.

Pungency of chilli is due to

  1. Capsaicin

  2. Paperin

  3. Diosgenin

  4. Shikorin


Correct Option: A
Explanation:

The spiciness in the chili peppers is known as pungency and it due to the presence of a group of compounds called capsaicinoids. Capsaicin is the major spice-producing alkaloid present in peppers.

So the correct option is A.

Chicory powder which is mixed with coffee powder is obtained from

  1. Root

  2. Leaf

  3. Stern

  4. Seeds


Correct Option: A
Explanation:

Chicory is a plant whose botanical name is Cichorium intybus. It is a tuberous plant in which the root of the plant is used for coffee.

So the correct option is A.

Major foreign exchange earner for India is

  1. Tea

  2. Coffee

  3. Rice

  4. Wheat


Correct Option: A
Explanation:

India ranks second in the production of tea after China and is number one in exporting tea. 

So the correct option is A.

Cinnamon is obtained from

  1. Cinnamomum zeylanicum

  2. Eugenia caryophyllata

  3. Coriandrum sativum

  4. Capsicum annum


Correct Option: A
Explanation:

Cinnamon is obtained from the bark of the plant Cinnamomum zeylanicum.

So the correct option is A.

Chewing gum is produced from

  1. Achras sapota

  2. Cajanus

  3. Prunus

  4. Cocos


Correct Option: A
Explanation:
Chewing gum which is also known as chicle gum was made from the sap of the Sapodilla tree. Sapota (Manilkara archas Forb.) belongs to Sapotaceae family and its higher classification is Manilkara zapota.
So the correct option is A.

Which of the following is the new world spice that has become an essential part of Indian cuisine

  1. Red pepper

  2. Cardamom

  3. Ginger

  4. Black pepper


Correct Option: A
Explanation:

Bell pepper is originated in Mexico and recently it has become as one of the spice varieties in India. Cardamom, ginger and black pepper are ancient spices that always exist in India.

So the correct option is A.

Vitis is a tendril climber, a species which is extensively used for

  1. Charas

  2. Wine

  3. Opium

  4. Volatile oil


Correct Option: B
Explanation:

Vitis Riparia, the species most widely distributed in the northern United States is mostly used for making hybrid varieties of wine grapes for the production of wine.

So the correct option is B.

The plant whose seeds yield safflower and the petals an orange dye is


  1. Calendula officinalis

  2. Helianthus annuus

  3. Rauwolfia serpentine

  4. Carthamus tinctorius


Correct Option: D
Explanation:

Safflower (Carthamus tinctorius) is a highly branched herbaceous annual plant which is commercially cultivated for vegetable oil. The dried florets of safflower produces red to orange-red dye (known as carthamin).

So the correct option is D.

Bhojpatra is derived from

  1. Bark of Cinchona

  2. Bark of Dalbergia

  3. Bark of Betula utillis

  4. Leaves of Piper


Correct Option: C
Explanation:

Betula utilis is a birch tree of Himalayas that grows upto 4,500 m (14,800 ft). The white, paper-like bark of the tree called bhojpatra was used for writing Sanskrit scriptures and texts.

So the correct option is C.

Germinating barley seeds are used in preparation of

  1. Cheese

  2. Wine

  3. Beer

  4. Lactic acid


Correct Option: C
Explanation:

Barley seeds are germination to produce beer through fermentation.

So the correct option is C.

Which part of the plant Eugenia aromatica do we use (in the form of cloves) as an aromatic spice

  1. Dried fruit

  2. Dried and roasted seed

  3. Unopened dried flower bud

  4. Dried leaf


Correct Option: C
Explanation:

Cloves are the unopened dried flower buds of the species Syzygium aromaticum.

So the correct option is C.

Which of the following provides 3 important ingredients of our food namely carbohydrates, fats and proteins

  1. Ground nut

  2. Gram

  3. Castor

  4. Mango


Correct Option: A
Explanation:

Groundnut is low in carbohydrates and high in proteinfat, and fiber.

So the correct option is A.

A fibre of greatest commercial importance is derived from epidermis of seeds or outside the seed coat is

  1. Flax

  2. Coir

  3. Cotton

  4. Hemp


Correct Option: C
Explanation:

Cotton fibres (Gossypium) are the outgrowth of the epidermis. These are the epidermal cells and they become elongated.

So the correct option is C.

Assertion : Theine cause bitterness and astringency of tea leaves.

Reason : The flavour of tea is due to the ethereal oil.


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true


Correct Option: E
Explanation:

Theine is the element that is responsible for the stimulating and refreshing qualities of the tea. The bitterness and astringency of the leaves are due to the presence of tannins. 

The aroma and flavour of the tea are due to the presence of the ethereal oil.

The plant which is used as a source of spice as well as dye is

  1. Turmeric

  2. Cardamom

  3. Clove

  4. Indigofera


Correct Option: A
Explanation:

Turmeric and Indigofera are used as dyes. In these only turmeric is used as spice whereas Indigofera is not used for cooking purposes.

So the correct option is A.

Rat poison is obtained from

  1. Urginea

  2. Lilium

  3. Asparagus

  4. Aloe vera


Correct Option: A
Explanation:

Red squill is obtained in the powder form from a plant Urginea maritima. It is used as a rodenticide and it is the commonly used rat poison.

So the correct option is A.

One of the group of fibre yielding plants of economic importance is

  1. Gossypium, Hibiscus, Crotalaria, Cannabis

  2. Gossypium, Cassia, Lycopersicum

  3. Gossypium, Brassica, Glycine

  4. Gossypium, Agave. Nicotiana


Correct Option: A
Explanation:

Some of the fibre yielding species from the different world centres are Abutilon theophrastii, Cannabis sativa ( Chinese centre), Musa textilis (South East Asian centre), Corchorus capsularis, Crotalaria juncea, Hibiscus cannabis (Hindustani centre), Agava sisalana, Gossypium hirsutum (South American centre).


The fibres of commercial importance are obtained from

  1. Parenchyma

  2. Collenchyma

  3. Chlorenchyma

  4. Sclerenchyma


Correct Option: D
Explanation:

Sclerenchyma fibers are of great economic importance as they constitute the source material for a variety of fabrics (e.g. flax, hemp, jute, etc)

So the correct option is D.

Which of the following plant seeds are used as "jewellery's weight"

  1. Calanus cajan

  2. Lens culinaris

  3. Glycine max

  4. Abrus precatorious


Correct Option: D
Explanation:

Abrus precatorius is a small seed which is used as jewellery weight.

It belongs to the family Leguminosae.

So the correct option is D.

Which of the following is grown as most important source of textile fibres in Bengal

  1. Crotolaria

  2. Gossypium

  3. Corchorus

  4. Linum


Correct Option: C
Explanation:

(c) Corchorus is mainly grown in Bengal because of the climatic and soil conditions of this region. These conditions are favourable to this crop and abundant water of Hugli river is available for the rotting of fibres.

So the correct option is C.

Which of the following is wrongly matched

  1. Indigofera - Dye

  2. Sesbania - Fodder

  3. Petunia - Fumigatory

  4. Aloe - Medicine

  5. Asparagus - Vegetable


Correct Option: C
Explanation:

Petunia is used as an ornamental plant and it comes under family Solanaceae. Tobacco is used as a fumigatory source in the family Solanaceae.

So, option C is the wrong match.

Saffron is produced from

  1. Roots

  2. Petals

  3. Stamens

  4. Style stigma of carpels of crocus plant


Correct Option: D
Explanation:

Saffron is obtained by just picking the yellow stigma and style of the plant Crocus sativus.

So the correct option is D.

Assertion : Vegetable oils are fats, which are present in plant cells in soluble form.

Reason : Vegetable oils only occur in cells of the embryo.


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true


Correct Option: D
Explanation:

Vegetable oils and fats are present in the form of small insoluble droplets within the plant cells. They occur in the seeds and most commonly in the endosperm and cotyledons. In most of the cereals, the fat occurs in the embryo. 

Olive and palm oils are two important examples that are obtained from the fleshy pericarp of the fruit. Oils and fats are extracted from the roots, stems and foliage very less frequently.
So the correct option is D.

Which of the raw material is used in paper industry

  1. Agave

  2. Ficus

  3. Bambusa

  4. Corchorus


Correct Option: C
Explanation:

Paper is prepared from Bambusa vulgaris tree which is a rich source of cellulose.

So the correct option is C.

Which of the following is called "Dhaan ka Katora"

  1. Gwalior

  2. Indore

  3. Chhattisgarh

  4. Rewa


Correct Option: C
Explanation:

Chhattisgarh is named as Dhan ka katara because of their
cultivation of Dhan or Rice crop.

So the correct option is C.

Central institute of toxicology is at

  1. Lucknow

  2. Madras

  3. Bombay

  4. Delhi


Correct Option: A
Explanation:

The Indian Institute of Toxicology is located in Lucknow.

So the correct option is A.

In South East Asia, the basis of early agriculture was the
planting of

  1. Millets

  2. Legumes

  3. Some cereals

  4. Underground parts


Correct Option: D
Explanation:

In South-East Asia, earlier the agriculture was practised by planting the base parts of the plant.

So the correct option is D.

Assertion : Pigeon pea is the second most important pulse in India.

Reason : Pigeon pea is a woody, perennial shrub.


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true


Correct Option: B
Explanation:
Pigeonpea is the second most important pulse in India and India is the largest producer of pigeon pea. Pigeonpea, also known as Cajanus cajan, is a perennial shrub belonging to the family Fabaceae. It is a highly branched shrub with a woody base, slender stems and trifoliate leaves.
So the correct option is B.

Assertion : Sunflower oil is suggested for heart patients.

Reason : Sunflower oil does not increase the cholesterol level


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true


Correct Option: A
Explanation:

(a) Sunflower oil can be safely used by heart patients because sunflower oil does not raise the cholesterol level in the blood.

SO the correct option is A.

Which of the following is most important source of food

  1. Lichen

  2. Angiosperms

  3. Algae

  4. Fungi


Correct Option: B
Explanation:

Angiosperms are seeded plants and they serve as the main source of
food seeds.

So the correct option is B.

One of the following is a social foresting species with
multiple utility

  1. Mangifera indica (Mango)

  2. Leucaena leucocephala (Subabul)

  3. Borassus flabelliformis (Palmyrah palm)

  4. Rosa grandiflora (Rose)


Correct Option: B
Explanation:

Leucaena leucocephala (Subabul) is a quick-growing
the small leguminous plant included in social
forestation.

So the correct option is B.

What statement is true about microspore of angiosperms.

  1. Resultant of mitotic division

  2. First cell of gamophytic generation

  3. Resultant of double fertilization

  4. First cell of endosperm


Correct Option: B

Richest source of vitamin 'C' is ______________.

  1. Capsicum frutescens

  2. Emblica officinalis (Amla)

  3. Orange

  4. Lemon


Correct Option: B
Explanation:

(b) The fruits of Emblica officinalis are great medicinal value and it is one of the richest source of vitamin C.

So, the correct answer is 'Emblica officinalis (Amla)'

In India the state famous for peanut cultivation is

  1. Gujarat

  2. Maharashtra

  3. Punjab

  4. Tamilnadu


Correct Option: A
Explanation:

Gujarat tops with 27.87 percent of the total production of peanuts in India.

So the correct option is A.

During summer, Khas khas mats for cooling air are prepared
from the roots of

  1. Bambusa nana

  2. Saccharum manja

  3. Vetiveria zizanoides

  4. Setaria pumila


Correct Option: C
Explanation:
Khas khas mats are widely used in i\India to beat the summer heat. They are prepared with dry grass (Vetiveria zizanoides) or hay which can store a lot of water and are hung around the house. Then the water present in these mats absorb the heat from the surroundings in the form of latent form of energy and thus evaporates.
So the correct option is C.

Which fibre crop occupies the maximum area in India or the most cultivated fibre crop in India is _______.

  1. Jute

  2. Cotton

  3. Flax

  4. Sisal


Correct Option: B
Explanation:

 India is 10% producer of cotton (Gossypium herbaceum) in whole world. The fibers are obtained from the fruit, a capsule. Cotton is mainly cultivated in Punjab, Maharashtra, Gujarat. 

So, the correct answer is 'Cotton'

Cultivated cotton is obtained from ____________.

  1. Two species

  2. Three species

  3. Four species

  4. One species


Correct Option: C
Explanation:

Cotton obtained from four species of Gossypium genus namely, Gossypium arboreus, G. herbaceum (2n,) G.
hirsutum, G. barbadense (4n).

So, the correct answer is 'Four species'

Which of the following is a pseudo-cereal crop

  1. Maize/Zea mays

  2. Barley/Hordeum vulgare

  3. Buck wheat/Fagopyrum esculentum

  4. Rice/Oryza sativa


Correct Option: C
Explanation:

pseudocereal crop is a non-grass that are used in the same way as cereals (true cereals are grasses). Examples are amaranth, quinoa, and buckwheat.

So the correct option is C.

Which of the following plant yields oil and fibre both ____________.

  1. Cocos nucifera

  2. Eucalyptus

  3. Brassica campestris

  4. Euphorbia hirta


Correct Option: A
Explanation:

(a) Coconut (Cocos nucifera) is a plant the fruit is a Drupe that yields both fibres and the dried endosperm is used for obtaining oil. Coconut oil is used in cooking oil as well as hair oii

So, the correct answer is 'Cocos nucifera'

The main source of food and fodder is

  1. Lichen

  2. Cereals

  3. Fungus

  4. Cotton


Correct Option: B
Explanation:

Cereals is the main source of food and fodder.

So the correct option is B.

Match List- I with List-II and select the correct answer.

List-I List-II
a. Medicago sativa $1$. Fodder
b. Tabebuia chrysantha $2$. Ornamental
c. Sesbania cannabina $3$. Biofertilizer
d. Derris elliptica $4$. Insecticide
  1. A-$2$, B-$1$, C-$3$, D-$4$

  2. A-$1$, B-$2$, C-$3$, D-$4$

  3. A-$1$, B-$3$, C-$2$, D-$4$

  4. A-$1$, B-$2$, C-$4$, D-$3$


Correct Option: A

Epidermal hairs of the seed coat are the important commodity in

  1. Coconut

  2. Jute

  3. Banana

  4. Cotton


Correct Option: D

In the mature pollen grains of angiosperms, recognition proteins are located in the ___________.

  1. Bulbine

  2. Intine

  3. Nexine

  4. Exine


Correct Option: A

The active chemical drug reserpine is obtained from 

  1. Datura

  2. Rauwolfia

  3. Atropa

  4. Papaver


Correct Option: B
Explanation:
Reserpine (also known by trade names Raudixin, Serpalan, Serpasil) is an indole alkaloid, antipsychotic, and antihypertensive drug that has been used for the control of high blood pressure and for the relief of psychotic symptoms, although because of the development of better drugs for these purposes and because of its numerous side-effects, it is rarely used today. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral vascular resistance. Reserpine-mediated depletion of monoamine neurotransmitters in the synapses is often cited as evidence to the theory that depletion of the monoamine neurotransmitters causes subsequent depression in humans (c.f. monoamine hypothesis). However, this claim is not without controversy. The reserpine-induced depression is considered by some researchers to be a myth, while others claim that teas made out of the plant roots containing reserpine have a calming, sedative action that can actually be considered antidepressant. Notably, reserpine was the first compound shown to be an effective antidepressant in a randomized placebo-controlled trial. Reserpine was isolated in 1952 from the dried root of Rauwolfia serpentina.
So the correct option is 'Rauwolfia'.

Which of the following groups of characteristics is applicable to the timber obtained from Sal(Shorea)?

  1. Strong, durable, moderately heavy, takes good polish

  2. Strong, durable, heavy, does not take good polish

  3. Strong, durable, heavy. takes good polish

  4. Not strong, durable if not exposed, light, does not take good polish


Correct Option: A

Which gas easily oxidize paints, textile fibers and dyes?

  1. $CO _{2}$

  2. $O _{2}$

  3. $O _{3}$

  4. $H _{2}S$


Correct Option: C

Match List I with List II and select the correct answer using the codes below the lists:

List-I(Timber) List-II(Country)
A. Cedar 1. Myanmar
B. Douglas Fir 2. Canada
C. Mahogany 3. Mexico
D. Teak 4. Honduras
  1. A - 2, B - 3, C - 4, D - 1

  2. A - 3, B - 2, C - 4, D - 1

  3. A - 3, B - 2, C - 1, D - 4

  4. A - 2, B - 3, C - 1, D - 4


Correct Option: B
Explanation:
 Cedar  Mexico
 Douglas Fir  Canada
 Mahogany  Honduras
 Teak  Myanmar

So, the correct option is 'A - 3, B - 2, C - 4, D - 1'.

Fibre of great commercial importance derived from the epidermis is

  1. Flax

  2. Cotton

  3. Hemp

  4. Coir


Correct Option: B

The Botanical name of ''indian rai''

  1. Brassica campestris

  2. B. juncea

  3. B. nigra

  4. B. alba


Correct Option: B
Explanation:

Brassica juncea, commonly known as Indian Rye or Indian mustard is a species of a mustard plant. Brassica species flowers are complete, bisexual, i.e., with functional male (androecium) and female (gynoecium), including stamens, carpels and ovary. Pollination is entomophilous i.e., by insects, or cleistogamy i.e., by self or allogamy i.e., by cross-pollination. 

So, the correct answer is 'B.juncea'

The botanical name of manila hemp is

  1. Cannabis sativa

  2. Hibiscus cannabinus

  3. Musa textilis

  4. Agave sisalana


Correct Option: C

Jute fibre deteriorates quickly due to presence of

  1. High cellulose

  2. Low cellulose

  3. High lignin

  4. Low lignin


Correct Option: C

The cotton thread fibres are

  1. Fibres taken out from stem

  2. Epidermal hairs of seeds

  3. Epidermal hairs of fruits

  4. Fibres taken out from roots


Correct Option: B

Which of the following crop is most important for human

  1. Barley

  2. Wheat

  3. Cotton

  4. Millet


Correct Option: B
Explanation:

Wheat is the most widely grown crop in the world and provides 20% of the daily protein and of the food calories for 4.5 billion people. It is the second most important food crop in the developing world after rice. The most planted crops throughout the world are wheat and maize (corn). 

So, the correct answer is 'Wheat'

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