Tag: androecium and gynoecium

Questions Related to androecium and gynoecium

Gynoecium having a number of free carpels is

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Syncarpous

  2. Apocarpous

  3. Polycarpellary

  4. Syngenesious

Show answer
Correct Option: B
Explanation:

Gynoecium having a number of free carpels is called apocarpous.

A. Syncarpous gynoecium has fused carpels.
B. Apocarpous gynoecium has free carpels.
C. Polycarpellary gynoecium has multiple carpels.
D. Syngenesious is the condition of stamens where anthers are fused but filaments are free.
Hence, the correct answer is 'Apocarpous'.

A flower with five unequal petals has largest posterior petal, two lateral slightly small petals and two anterior petals partially fused to form a boat-shaed structure. Which is not correct for such a flower?

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Descending imbricate aestivation

  2. Odd sepal anterior

  3. Piston mechanism of pollination

  4. Many carpels

Show answer
Correct Option: D
Explanation:

The flowers belonging to the Papilionaceae family has vexillary type of aestivation in which, there is one large posteriorly placed petal called vexillum that overlaps the lateral petals called wings. These wings overlap the anterior petals that are fused to form a boat like structure called keel or carina. This type of aestivation is also called descending imbricate. These flowers also have an odd anterior sepal. They show piston mechanism of pollination. Their gynoecium is one carpel, it is monocarpellary, superior, unilocular with marginal placentation. For example, Pea, Dalbergia etc.

Hence, the correct answer is 'Many carpels'

Gynobasic style is found in _________.

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Labiatae$/$ Lamiaceae

  2. Liliaceae

  3. Gramineae$/$ Poaceae

  4. Compositae$/$ Asteraceae

Show answer
Correct Option: A
Explanation:

When ovary is lobed and the style emerges from the depressions of the lobes of the ovary, it is called gynobasic style. It is seen in the family Lamiaceae or Labiatae. 

Hence, the correct answer is 'Lamiaceae or Labiatae' 

Match the lists.

I II
(a) Bicarpellary, unilocular (i)

Hyoscyamus

| | (b) | Bicarpellary, bilocular | (ii) |

Ulex

| | (c) | Multicarpellary, multilocular | (iii) |

Scilla

| | (d) | Monocarpellary, unilocular | (iv) | Citrus | | | | (v) | Capsicum |

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. a-(iii), b-(v), c-(iv), d-(i)

  2. a-(iv), b-(i), c-(iii), d-(v)

  3. a-(v), b-(i), c-(iv), d-(iii)

  4. a-(v), b-(iii), c-(i), d-(ii)

Show answer
Correct Option: A
Explanation:
   Column I    Column II
 (a)  Bicarpellary, unilocular (iii)  Scilla 
 (b)  Bicarpellary, bilocular (v)  Capsicum 
 (c) Multicarpellary, multilocular   (iv)  Citrus
 (d)  Monocarpellary, unilocular (i)  Hyoscyamus 

(a) Scilla belongs to the family Liliaceae. It shows bicarpellary gynoecium with the unilocular ovary having two ovules arranged in the axile placentation.

(b) Capsicum belongs to the family Solanaceae. The gynoecium is bicarpellary with bilocular ovary showing the axile placentation.
(c) Citrus belongs to the family Rutaceae. The gynoecium is multicarpellary (5 carpels) with multilocular ovary showing axile placentation.
(d) Hyoscyamus belongs to the family Solanaceae but it shows the monocarpellary gynoecium with the unilocular ovary.
Hence, the correct answer is 'a-(iii), b-(v), c-(iv), d-(i)'.

Gynoecium with fused carpels is

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Syncarpous

  2. Syngenesious

  3. Sympatric

  4. Cleistocarpic

Show answer
Correct Option: A
Explanation:

Gynoecium with fused carpels is called syncarpous. Gynoecium with free carpels is called apocarpous.

Hence, the correct answer is 'Syncarpous'

The seed coat is formed from which of the following structure(s)

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Integuments

  2. Endosperm

  3. Ovary

  4. Residues of sepals

Show answer
Correct Option: A
Explanation:

A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm plants. The maturing ovule undergoes marked changes in the integuments, generally a reduction and disorganisation but occasionally a thickening. The seed coat formed from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant, the inner integument forms the tegmen and the outer forms the testa

So, the correct answer is 'integuments'

A is a closed vessel that contains an ovary in which eggs develop, fertilization occurs, and seeds mature

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Pollen sac

  2. Receptacle

  3. Microsporophyll

  4. Carpel

Show answer
Correct Option: D
Explanation:

Carpel is the female reproductive organ of a flower, consisting of an ovary, a stigma, and usually a style. A carpel is the female reproductive part of the flower, interpreted as modified leaves bearing structures called ovules, inside which the egg cells ultimately form. It may occur singly or as one of a group. Fertilization of an egg within a carpel by a pollen grain from another flower results in seed development within the carpel

So, the correct answer is 'carpel'

Part of the gynoecium which receives the pollen is called.

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Style

  2. Stigma

  3. Ovule

  4. Ovary

Show answer
Correct Option: B
Explanation:

Transfer of pollen grains to the stigma of a pistil is called pollination. Stigma is large and feathery so that it can trap air-borne pollen grains. 

So, the correct option is 'Stigma'.

The statements given described certain features that are observed in the pistil of flowers.
I. Pistil may produce more than one seed
II. Each carpel may have more than one ovule
III. Each carpel has only one ovule
IV. Pistil have only one carpel
Choose the statements that are true from the options given.

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. i and ii

  2. i and iii

  3. ii and iv

  4. iii and iv

Show answer
Correct Option: A
Explanation:

The pistils of flowers are composed of carpels which contain many ovules that have seeds inside of them. Hence, a single pistil is capable of producing more than one ovule. 

So, the correct answer  is 'i and ii'.