Advertisements
Advertisements
प्रश्न
Observe the figure below. Write functions of the labelled parts.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
Name and differentiate between the two modes of pollination in flowering plants.
The reproductive part of a plant is the ______.
State the name of the functional unit concerned with sexual reproduction.
What is made in anther of a flower?
Explain the terms 'cross-pollination'?
Name the part of a seed which grows into root.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is meant by ‘unisexual flowers’?
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Write the names of male and female reproductive parts of a flower.
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Explain sexual reproduction in plants.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
Mention pollination types.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Differentiate between self-pollination and cross-pollination.
Define.
Inflorescence
Draw a neat and labelled diagram.
Double fertilization in angiosperms
The anther wall consists of four wall layers where ______
How many middle layers are generally present in the wall of the anther lobes?
Flowers showing ornithophily show few characteristic like ______.
In a flowering plant, archesporium gives rise to ______.
Conidia are formed endogenously while zoospores are formed endogenously.
Length of pollen tube depends on the distance between ______
Sketch and label the essential and accessory whorls of flower.
Give any two examples of agents of pollination.
What is the structural unit of sexual reproduction in plant?
What are the agents for pollination?
Triple fusion involves ______.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
 |
Explain the post fertilization changes that occur in the ovary of a flower.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
