Tag: botany

Questions Related to botany

Hypanthodium is?

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Thalamus

  2. Fruit

  3. Inflorescence

  4. Ovary

Show answer
Correct Option: C
Explanation:
A. Thalamus is the swollen, basal part of the pedicel or the stalk.
B. Fruit is the presence of flowering plants or the angiosperms. After fertilization, the ripened ovary or mature ovary is called fruit.
C. The inflorescence is the arrangement of flowers on the floral axis of the plant. Hypanthodium is fleshy receptacle forming a hollow cavity with an apical opening called ostiole. The example is ficus.
D. The ovary is the basal swollen part of the carpel and female reproductive organ.

So, the correct answer is 'Inflorescence'.

All the florets are disc florets in _________.

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Launea

  2. Vernonia

  3. Sunflower

  4. Tridax

Show answer
Correct Option: B
Explanation:

All the florets are disc florets in vernonia. The name of an exceedingly large and wide spread family of flowering plants.

Find the correct match.

Column-I Column-II
(a) Gall flowers (i) Theobroma
(b) Sympoidal axis (ii) Bougainvillea
(c) Achlamydeous (iii) Ficus
(d) Cauliflory (iv) Euphorbia
(v) Hamelia
botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. $a-3, b-5, c-1, d-2$

  2. $a-3, b-4, c-2, d-1$

  3. $a-3, b-4, c-1, d-2$

  4. $a-3, b-5, c-4, d-1$

Show answer
Correct Option: D

Longest inflorescence is that of.

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Lily

  2. Cassia

  3. Callistemon

  4. Agave

Show answer
Correct Option: B
Explanation:

The flowers of Cassia fistula are grouped in the axillary and many-flowered racemes. These inflorescences are large in size and up to 15-40 cm long, pendulous and bright yellow. Long inflorescence of Cassia fistula from Sri Lanka and reaching up to 238 cm. It can be considered as the longest recorded legume inflorescence.

So the correct option is B.

Diplostemonous androecium occurs in _______.

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Silene

  2. Murraya 

  3. Asparagus

  4. Brassica

Show answer
Correct Option: B
Explanation:

Diplostemonous androecium occurs in murraya. It is a bearing small, white, scented flowers. The species is widely grown as an ornamental tree or hedge. In displostemonous condition, two whorls of stamens are found, stamens of outer, whorl are alternate with petals, while the stamens of inner whorl are opposite to petals. e.g. Murraya exotica.

Therefore, It occurs in Murraya. 

Inflorescence is thyrse$/$thyrsus in ________.

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Lantana

  2. Grape

  3. Jasminum

  4. Echinops

Show answer
Correct Option: B
Explanation:

A thyrse/thyrsus is a type of inflorescence in which the main axis grows indeterminately and the subares (branches) have determinate growth. Inflorescence is thyrse/ thyrsus in Grape.

In Dorstenia, the inflorescence is?

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Coenanthium

  2. Anthodium

  3. Spike of spikes

  4. Spikelet

Show answer
Correct Option: A
Explanation:
A. Coenanthium in which the receptacle, instead of forming a closed structure, becomes saucer-shaped with the margins slightly curved up. The example is dorstentia belonging to the family Moraceae. 
B. Anthodium or capitulum or head bears many sessile and small florets. The main axis becomes flat and called receptacle. It is a type of racemose inflorescence. Example: sunflower.
C. Spike in which peduncle has bisexual and sessile flowers. It is a type of the racemose inflorescence. 
D. Spikelet is small and special spike. Flowers are produced in the axil of fertile bracts called lemma. It is type of racemose inflorescence. 

So, the correct answer is 'Coenanthium'.

Inflorescence with single central achlamydeous female flower surrounded by number of achlamydeous male flowers is

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Cyathium

  2. Verticillaster

  3. Spadix

  4. Hypanthodium

Show answer
Correct Option: A
Explanation:

A) Cyathium is the special inflorescence in which the single female flower is present in the center and is surrounded by a number of male flowers inside a cup-shaped involucre.

ex-Euphorbia.
B) Verticillaster is a special inflorescence in which flowers are arranged in two opposite cymose groups on each node.
ex-Osmium (Tulsi).
C) The spadix is a type of racemose inflorescence in which a spadix is covered by a spathe.
ex-maize and bananas.
D) Hypanthium has a flask-shaped fleshy receptacle a pore or ostiole lined by scales and as short canal bearing hair.
ex-Ficus(peepal)
So the correct option is 'Cyathium'.

Match the column I with column II and select the correct option from the gives codes.


   Column I     Column II  
 A.  Pedicel  (i)  Reduces leaf  
 B.  peduncle  (ii)  Stalk of the flower
 C.  Bract   (iii)  Stalk of the leaf 
 D.  Petiole  (iv)  Inflorescence axis

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. A-(ii), B-(iv), C-(i), D-(iii)

  2. A-(iii), B-(iv), C-(i), D-(ii)

  3. A-(iii), B-(ii), C-(i), D-(iv)

  4. A-(ii), B-(iii), C-(i), D-(iv)

Show answer
Correct Option: A
Explanation:

(A) Pedicel - Stalk of the flower

(B) Peduncle - Inflorescence axis
(C) Bract - Reduced leaf
(D) Petiole - Stalk of the leaf
So, the correct answer is (a).

Awn of wheat and barley is developed from

botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

  1. Glume I

  2. Glume II

  3. Lemma

  4. Palea

Show answer
Correct Option: C
Explanation:

Awns are characteristic of many grasses (Poaceae), where they extend from the lemmas of the florets. This often makes the hairy appearance of the grass synfloresce. Awns may be long or short, straight or curved, single or multiple per floret. Some genera are named after their awns, such as the three-awns (Aristida). In some species, the awns can contribute significantly to photosynthesis, as, for example, in barley. The awns of wild emmer wheat spikelets effectively self-cultivate by propelling themselves mechanically into soils.
During a period of increased humidity during the night, the awns of the spikelet become erect and draw together and in the process push the grain into the soil. During the daytime the humidity drops and the awns slacken back again. However, fine silica hairs on the awns act as ratchet hooks in the soil and prevent the spikelets from reversing back out again. So, awn of wheat and barley develops from lemma. 
Therefore, the correct answer is option C.