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प्रश्न
Observe the figure below. Write functions of the labelled parts.
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उत्तर
- Gynoecium (Carpel): It is an essential whorl. It is consists of stigma, style and ovary. It acts as a female reproductive part of the flower. It is responsible for the production of female gametes.
- Androecium (Stamen): It is an essential whorl. It is consists of anther and filament. It acts as a male reproductive part of the flower. It is responsible for the production of male gametes.
- Calyx and corolla: Calyx and corolla are accessory whorls. They are responsible for the protection of inner (essential) whorls.
- Pedicel: Pedicel is a small stalk which supports the flower.
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संबंधित प्रश्न
A student was asked to observe and identify the various parts of an embryo of a red kidney bean seed. He identified the parts and listed them as under:
I. Tegmen
II. Testa
III. Cotyledon
IV. Radicle
V. Plumule
The correctly identified parts among these are
(A) I, II and III
(B) II, III and IV
(C) III, IV and V
(D) I, III, IV and V
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
Name the parts A, B and C shown in the following diagram and state one function of each.
A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
Name and differentiate between the two modes of pollination in flowering plants.
A student identified the various parts of an embryo of a gram seed and listed them as given below :
(I) Testa
(II) Plumule
(III) Radicle
(IV) Cotyledon
(V) Tegmen
Out of these the actual parts of the embryo are :
(A) I, II, III
(B) II, III, IV
(C) III, IV, V
(D) II, IV, V
Name the parts labelled as A, B, C and D in the diagram given below:
The anther contains ______.
The fusion of male and female gametes is termed as ______.
The process of fusion of the male and female gametes is called ______.
State the name of the functional unit concerned with sexual reproduction.
Name the part made up of the stigma, style and ovary.
Where are the pollen grains produced?
What are the reproductive organs in a flower?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Give some examples of different modes of fertilisation in nature?
Name the part of a seed which grows into root.
Name the part of a seed which grows into shoot.
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
Draw a labelled diagram of a bisexual flower.
Explain the process of fertilisation in flowers.
Mention pollination types.
Differentiate between self-pollination and cross-pollination.
Pollen grains are formed by _________ division in locules of anthers.
The male reproductive part of a flower is ______.
The essential parts of a flower are ______.
Identify the parts A, B, C, and D?
Which of the following are the chemical components of the wall of pollen tube?
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
Double fertilization means ______.
Give any two examples of agents of pollination.
In a plant flower the female whorl is ______.
Type of sexual reproduction is ______.
Explain the post fertilization changes that occur in the ovary of a flower.
