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प्रश्न
Sketch and label the essential and accessory whorls of flower.
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उत्तर
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
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
A flower may have either male or female reproductive parts. Such a flower is called ______.
The reproductive part of a plant is the ______.
Mature ovary forms the ______.
Name the part made up of the stigma, style and ovary.
Name the male part of the flower.
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
Explain the terms 'self pollination'
Give some examples of different modes of fertilisation in nature?
What type of plants reproduce by sexual reproduction method?
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?
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 what ways is fertilisation in a plant similar to fertilisation in a human?
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Mention the function of Stigma.
What are the male and female gametes in a flowering plant?
Identify A, B, C and D in the given diagram and write their names.
What is phototropism?
Identify the odd. Stigma, Style, Pollen, Ovary.
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______________.
Differentiate between self-pollination and cross-pollination.
Answer the following question.
List two agents of 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 ______.
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Which of the following is the outermost protective layer of anther?
Gloriosa superba exhibits ______.
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
In a plant flower the female whorl is ______.
What is the structural unit of sexual reproduction in plant?
What is the function of calyx?
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
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