Tag: basics of leaf and flower

Questions Related to basics of leaf and flower

Inflorescence having unisexual sessile flowers is

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

  1. Spike

  2. Spikelet

  3. Catkin

  4. Raceme

Show answer
Correct Option: C
Explanation:

A catkin is a slim, cylindrical cluster of flowers with no petals, usually wind-pollinated and sometimes insect pollinated. The female flowers in catkin are sessile and solitary in the axilla of a bractea longer than themselves. In spike, flowers are bisexual, sessile or non- pedicellate. In spikelet, flowers are hermaphrodite. In raceme, flowers are pedicellate an bisexual.

Inflorescence of sunflower is

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

  1. Umbel

  2. Cyathium

  3. Hypanthodium

  4. Capitulum

Show answer
Correct Option: D
Explanation:
Sunflower is an annual plant of family Asteraceae with a large head (capitulum), which is the characteristic inflorescence of sunflower. Depending upon the variety, the inflorescence may consist of ray flowers, disk flowers or both. The ovary of each flower is situated below the attachment of the corolla and stamens, a condition referred to as epigynous or inferior. This is the largest family of flowering plants
So, the correct answer is 'Capitulum'

Arrangement of floral members which are partly spiral and partly in whorl is

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

  1. Cyclic

  2. Acyclic

  3. Hemicyclic

  4. Pentacyclic

Show answer
Correct Option: C
Explanation:

Hemicyclic flowers are flowers having floral leaves partly in spiral and partly in whorl. 

The inflorescence found in the coconut plant is

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

  1. Spadix

  2. Compound spadix

  3. Compound spike

  4. Compound corymb

Show answer
Correct Option: B
Explanation:

  1. The type of inflorescence in which flowers are protected by enveloping bracts known as a spathe. ex:-banana.
  2. The flowers are protected by spathe but the axis is branched. ex: palm and coconut.
  3. The axis is branched and the flowers are born sessile on the branches. ex: wheat.
  4. When the main axis is branched and flowers are arranged in a corymbose manner. ex:-cauliflower
So the correct option is "Compound spadix".

Axis between corolla and androecium is

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

  1. Anthophore

  2. Gynophore

  3. Gynandrophore

  4. Androphore

Show answer
Correct Option: D
Explanation:

The axis or the internode that elongates between the corolla and androecium is called androphore. It is also called as gynandrophore. Anthophore is present between calyx and corolla. Gynophore is present between androecium and gynoecium.

Hence, the correct answer is 'Androphore'

A student observed $34$ inflorescence in Bougainvillea and $42$ inflorescence in Poinsettia. Find out the number of flowers in Bougainvillea and the number of female of flowers in Poinsettia respectively.

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

  1. $34, 126$

  2. $204, 164$

  3. $102, 42$

  4. $68$, indefinite

Show answer
Correct Option: C
Explanation:

The inflorescence in the Bougainvillea flower is a simple cyme or cymule. In the cymule, the peduncle ends in a flower and only 2 lateral branches. These are produced which also ends in flowers. Thus, 3 flowered inflorescences will be formed. Flowers are arranged in a basipetal manner. Since the inflorescence number will be given here 34. Thus, the total numbers of flowers would be $34 \times 3 = 102.$

Single female flower-like inflorescence of the Euphorbiaceae i.e. Poinsettia is called a cyathium. The single female flower of cyathium has 3 carpels syncarpous pistil. Also, the inflorescence number given here is 42. Thus hence the number of female flowers is 42.

So, the correct answer will be 102,42.

The correct option is C.

Cup-like structure developed from adnation of sepals, petals and stamens is

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

  1. Cyathium

  2. Hypanthodium

  3. Hypanthium

  4. Capitulum

Show answer
Correct Option: C
Explanation:

Hypanthium is the cup-like structure that develops from the fusion of sepals petals and stamens to the thalamus outgrowth and it is seen in the family Rosaceae. 

A. Cyathium is the inflorescence seen in Euphorbia in which a cup-shaped involucre surrounds pistillate flowers. 
B. Hypanthodium is the flask-shaped inflorescence, the male flowers are near the periphery while the female flowers are near the centre. Example, Ficus.
C. Hypanthium is the cup-like structure that develops from the fusion of sepals petals and stamens to the thalamus outgrowth and it is seen in the family Rosaceae
D. The capitulum is the head like inflorescence having an aggregation of the sessile flowers. Example, Asteraceae.
Hence, the correct answer is 'Hypanthium'

Consider the following statements.
(a) In racemose inflorescence the flowers are borne in a basipetal order.
(b) Epigynous flowers are seen in rose plants.

(c) In Brinjal, the ovary is superior.
Of these statements

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

  1. A and b are true but c is false

  2. A and c are true but b is false

  3. A and b are false but c is true

  4. B and c are true but a is false

  5. A and c are false but b is true

Show answer
Correct Option: C
Explanation:

(a) In the racemose type of inflorescence, the youngest flower is borne near the apex and the oldest is borne at the base of the inflorescence. This is called the acropetal order. Basipetal order is seen in the cymose inflorescence.

(b) Rose belongs to the family wherein, the ovary is superior and present in a hypanthium, so the flowers in rose plants are hypogynous.
(c) Brinjal belongs to the family Solanaceae. It has hypogynous flowers as the ovary is superior.
Hence, the correct answer is 'A and B are false but C is true'.

In moss capsule, the number of peristome whorls are

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

  1. 1

  2. 2

  3. 3

  4. 4

Show answer
Correct Option: B
Explanation:

In mosses, the peristome is a specialized structure in the sporangium that allows for gradual spore discharge, instead of releasing them all at once.
Peristome is a ring of triangular teeth formed from the remnants of dead cells with thickened cell walls. There are usually 16 such teeth in a single peristome, separate from each other and able to both fold in to cover the stoma as well as fold back to open the stoma. There are two rings of peristome teeth - an inner endostome and an exostome. These are also referred as perostome whorls.
Therefore the correct option is B. 

Edible part of cauliflower is _______

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

  1. Bud

  2. Bract

  3. Inflorescence

  4. Leaves

Show answer
Correct Option: C