Tag: flower

Questions Related to flower

When the filament of anther is fixed at a point about the middle of the connective and the movement is free in the sac is called as ______

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

  1. Versatile

  2. Basifixed

  3. Adnate

  4. Dorsifixed

Show answer
Correct Option: A
Explanation:

In most grasses, the attachment is versatile where the filament is attached merely at a point about the middle of the connective so that the anthers can swing on it freely.

Which one of the following does not have a polycarpellary ovary?

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

  1. Guava

  2. Apple

  3. Coconut

  4. Fig

Show answer
Correct Option: D
Explanation:

Fig is a composite fruit which develops from a unicarpellary ovary which forms the fruitlets. Several fruitlets in a hypanthodium inflorescence form the actual fruit.

Guava is a false berry which develops from an inferior polycarpellary ovary.
Apple is a pome in which the fleshy part is the thalamus and inside it the actual fruit develops from a polycarpellary ovary.
Coconut is a type of drupe which develops from either a bicarpellary or a tetracarpellary ovary.
So, the correct answer is 'Fig'.

Hesperidium develops from an ovary which is

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

  1. Polycarpellary, superior and syncarpous

  2. Polycarpellary, inferior and syncarpous

  3. Polycarpellary, superior and apocarpous

  4. Bicarpellary, superior and syncarpous

Show answer
Correct Option: A
Explanation:
Hesperidium is a type of berry in which the epicarp and mesocarp fuse and form a leathery covering which can be removed and the endosperm forms the fibrous septa. It develops from a polycarpellary, superior and syncarpous ovary. So, the correct answer is 'Polycarpellary, superior and syncarpous'.

Vexillum, area and keel are

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

  1. Androecium

  2. Gynoecium

  3. Corolla

  4. Calyx

Show answer
Correct Option: C
Explanation:

Odd petal largest  posterior and outer most called vexillum (standard). It covers two wings (Alae) which in turn covers two small, fused petals called keel (carinae.)

Flowers showing basipetal succession are observed in

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

  1. Caesalpinia and Clerodendron

  2. Jasmine and Gold mohar

  3. Gold mohar and Caesalpinia

  4. Clerodendron and Jasmine

Show answer
Correct Option: D
Explanation:
Floral succession can be racemose, cymose, special type or mixed type. In racemose inflorescence, flowers are arranged in acropetal succession. in which the younger flowers are at the apex and the older flowers are at the base. In cymose inflorescence, flowers are arranged in basipetal succession in which the younger flowers are at the base and the older flowers are at the apex. Clerodendron and Jasmine show basipetal succession
So, the correct answer is 'Clerodendron and Jasmine'

When anthers have two chambers, they are described as.

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

  1. Dioecious

  2. Dithecous

  3. Diadelphous

  4. Dimorphic

Show answer
Correct Option: B

Which of the following statements are correct?
1. Rule of Priority in plant nomenclature commenced from $1853$
2. Binomial nomenclature was introduced by Linnaeus in $1753$
3. The orchid fruit contains five distinct seeds
4. Gynobasic style is found in Lamiaceae
Select the correct answer using the codes given.

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

  1. $1$ and $2$

  2. $2$ and $4$

  3. $1$ and $3$

  4. $2$ and $3$

Show answer
Correct Option: B
Explanation:

  1. The first rule commence for botanical nomenclature is in the year 1867 in Paris by A.P.de Candolle.
  2. Binomial nomenclature was given by Linnaeus in 1753.
  3. Orchids have the smallest seed in the world and produces millions in numbers.
  4. When style arises from the cavity from the centre of ovary or from thalamus is gynobasic style and it is the characteristic of Lamiaceae family.
So the correct statemnts are "2and 4".

Long filamentous threads protruding at the end of a young cob of maize are-

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

  1. Anthers

  2. Styles

  3. Ovaries

  4. Hairs

Show answer
Correct Option: B
Explanation:
In a cob of maize, each ovary has a long silky (hairy) style, called as corn silk. Collectively these styles protrude at the end of a young cob. The grains are formed on the cob which remains covered by the leafy bracts.

So, the correct answer is 'Styles'.

Which of the following wall layer of anthers shows fibrous thickening (of callose)?

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

  1. Epidermis

  2. Tapetum

  3. Middle layer

  4. Endothecium

Show answer
Correct Option: D

The statements given below describe certain features that are observed in the pistil of flowers.
I. Pistil may have many carpels.
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 option below.

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:

Each pistil is constructed of from one to many enrolled leaflike structures, or carpels, each of which encloses one or more ovules. The carpel is a single megasporophyll, or modified seed-bearing leaf. A pistil then may be composed of one carpel (simple pistil), as in the sweet pea, or of two or more carpels (compound pistil) partially or completely joined, as in the mustard (two carpels) or lily (three carpels). A carpel has three parts: stigma, ovary, and style. The stigma is responsible for pollination and is the top-most part of the carpel. The ovary is responsible for determining the number of carpels in a plant and is the bottom-most part of a carpel. Lastly, the style is responsible for connecting the stigma and ovary together, helping with the transfer of pollen through the carpel for pollination.


So, the correct option is 'Option A'.