Tag: biology

Questions Related to biology

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

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

  1. Ground nut

  2. Gram

  3. Castor

  4. Mango

Show answer
Correct Option: A
Explanation:

Groundnut is low in carbohydrates and high in protein, fat, 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

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

  1. Flax

  2. Coir

  3. Cotton

  4. Hemp

Show answer
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.


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: 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

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

  1. Turmeric

  2. Cardamom

  3. Clove

  4. Indigofera

Show answer
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

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

Show answer
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

Show answer
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

Show answer
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

Show answer
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.