Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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
Reveal answer Fill a bubble to check yourself
E Correct answer
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.

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

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

  1. Turmeric

  2. Cardamom

  3. Clove

  4. Indigofera
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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
Reveal answer Fill a bubble to check yourself
A Correct answer
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).


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

The fibres of commercial importance are obtained from

  1. Parenchyma

  2. Collenchyma

  3. Chlorenchyma

  4. Sclerenchyma
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Calanus cajan

  2. Lens culinaris

  3. Glycine max

  4. Abrus precatorious
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Crotolaria

  2. Gossypium

  3. Corchorus

  4. Linum
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which of the following is wrongly matched

  1. Indigofera - Dye

  2. Sesbania - Fodder

  3. Petunia - Fumigatory

  4. Aloe - Medicine

  5. Asparagus - Vegetable
Reveal answer Fill a bubble to check yourself
C Correct answer
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.