Tag: importance of plants

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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 whose seeds yield safflower and the petals an orange dye is


  1. Calendula officinalis

  2. Helianthus annuus

  3. Rauwolfia serpentine

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

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

Bhojpatra is derived from

  1. Bark of Cinchona

  2. Bark of Dalbergia

  3. Bark of Betula utillis

  4. Leaves of Piper
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

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

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

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).