Tag: basics of leaf and flower

Questions Related to basics of leaf and flower

From among the situations given, choose the one that prevents both autogamy and geitonogamy.

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Monoecious plant bearing unisexual flowers

  2. Dioecious plant bearing only male or female flowers

  3. Monoecious plant with bisexual flowers

  4. Dioecious plant with bisexual flowers

Show answer
Correct Option: B
Explanation:

Monoecious(bisexual)plant bearing either bisexual or unisexual flowers can exhibit both autogamy as well as geitonogamy. Dioecious(unisexual) plants bearing only male or female flowers will not show autogamy or geitonogamy and only xenogamy is possible.

Read the following four statements (A-D).


(A) Flowers are the morphological and embryological marvel and the site of sexual reproduction.
(B) Anther are attached to the proximal end of the filament of stamen.
(C) Androecium and gynoecium represent the non-essential part of the flower.

(D) The number and length of stamens are variable in flower of different species. 

How many statements are correct? 

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. One

  2. Two

  3. Three

  4. Four

Show answer
Correct Option: B
Explanation:

  • A flower is a reproductive structure of a flowering plant, which is a morphological and embryological marvel and the site of sexual reproduction.
  • Anther is attached to the distal end of the filament of the stamen.
  • Androecium (stamens) and gynoecium (pistils) represent essential parts of a flower.
  • The number and length of stamens are variable in flowers of different species.
So, the correct statements are 'Two'.

The perianth term is used when

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Calyx and gynoecium are similar.

  2. Calyx and corolla are similar.

  3. Androecium and calyx are similar.

  4. Corolla and gynoecium are similar.

Show answer
Correct Option: B
Explanation:

Calyx and corolla are called as accessory whorls. In some plants they are not differentiated from one another, in such case they are termed as perianth.

The fleshy edible part of jackfruit is derived from

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Bract

  2. Bracteole

  3. Perianth

  4. Floral axis

Show answer
Correct Option: A,C
Explanation:

The sheath or the perianth, of the inflorescense around the seed in the inflorescence is the edible part of the jackfruit. It is yellow shiny part. The perianth is the non-reproductive part of the flower and structure that forms an envelope surrounding the sexual organs, consisting of the calyx and the corolla.
Thus, the correct answer is option C.

Nectary of Euphorbia is an example of

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Complex tissue

  2. Secretory tissue

  3. Excretory tissue

  4. Simple tissue

Show answer
Correct Option: B
Explanation:

Nectary of Euphorbia is an example of secretory tissue. The tissues that are concerned with the secretion of gums, resins, volatile oils, nectar latex and other substances in plants are called as secretory tissues. These tissues are divided into two groups: laticiferous tissues and glandular tissues. 

Thus, the correct option is B.

Staminal tube is found in 

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Nicotiana

  2. Asparagus

  3. Hibiscus

  4. Pisum

Show answer
Correct Option: C
Explanation:

Stamens are numerous, epipetalous and monadephous. The filaments of all the stamens fuse to form staminal tube, round the style is a characteristic feature of family Malvaceae.

Edible part of apple is?

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Bract

  2. Thalamus

  3. Cotyledon

  4. Endosperm

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Correct Option: A

A flower devoid of sepals and petals/perianth is called

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Sessile

  2. Asymmetrical

  3. Achlamydeous

  4. Imperfect

Show answer
Correct Option: C
Explanation:

Achlamydeous flowers are those flowers that lack floral envelope. these flowers are also referred to as naked flowers.

So the correct answer is 'Achlamydeous'.

Male gametes are present in

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Anther

  2. Style

  3. Stigma

  4. Filament

Show answer
Correct Option: A
Explanation:

The whorl of the flower are differentiated into two categories essential and non-essential whorl and are consists of 

  1. Stamens or androecium are the male reproductive part and are divided into filament (long slender stalk) and anther (the terminal bilobed structure that produces male gametes).
  2. Carpels or gynoecium are the female reproductive part and produce ovum and is divided into three parts stigma (where pollen grains land), style(that leads pollen tube to the ovary) and ovary that produce ovum(female gamete).
So, the correct answer is 'Anther'

Which of these is a bisexual flower?

biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

  1. Petunia

  2. Corn

  3. Papaya

  4. None of these

Show answer
Correct Option: A
Explanation:

A bisexual flower is a flower that contains all the four whorls such as petals, sepals, the male reproductive structure (stamen) and female reproductive structure (pistil/ carpel). Hence it is also called as a complete or perfect flower. Petunia is a bisexual flower. Thus the correct answer is option A.