Tag: importance and classification of angiosperms

Questions Related to importance and classification of angiosperms

Rat poison is obtained from

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Urginea

  2. Lilium

  3. Asparagus

  4. Aloe vera

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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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Gossypium, Hibiscus, Crotalaria, Cannabis

  2. Gossypium, Cassia, Lycopersicum

  3. Gossypium, Brassica, Glycine

  4. Gossypium, Agave. Nicotiana

Show answer
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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Parenchyma

  2. Collenchyma

  3. Chlorenchyma

  4. Sclerenchyma

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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"

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Calanus cajan

  2. Lens culinaris

  3. Glycine max

  4. Abrus precatorious

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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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Crotolaria

  2. Gossypium

  3. Corchorus

  4. Linum

Show answer
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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Indigofera - Dye

  2. Sesbania - Fodder

  3. Petunia - Fumigatory

  4. Aloe - Medicine

  5. Asparagus - Vegetable

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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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Roots

  2. Petals

  3. Stamens

  4. Style stigma of carpels of crocus plant

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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.


biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  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

Show answer
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

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Agave

  2. Ficus

  3. Bambusa

  4. Corchorus

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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"

biology economic importance of plants and animals uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

  1. Gwalior

  2. Indore

  3. Chhattisgarh

  4. Rewa

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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.