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प्रश्न
In a plant flower the female whorl is ______.
पर्याय
Corolla
Calyx
Androecium
Gynoecium
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उत्तर
In a plant flower the female whorl is Gynoecium.
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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
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon.
On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
(a) Testa, Radicle, Cotyleddon
(b) Tegmen, Radicle, Micropyle
(c) Cotyledon, Plumule, Testa
(d) Radicle, Cotyledon, Plumule
State significance of pollination.
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
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
The anther contains ______.
Explain what you understand by sexual reproduction.
State the name of the functional unit concerned with sexual reproduction.
Name the part made up of the stigma, style and ovary.
What is the function of a flower?
What are the reproductive organs in a flower?
What is the name of female part of a flower?
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
Explain the terms 'self pollination'
How is the process of pollination different from fertilization?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
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 female gamete?
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Fill in the blanks:
A stamen consists of ______ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Mention the function of Stigma.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
Where does the endothecium layer of anther lobes is present?
Which type of development is observed in male gametophytes of plants?
Sperm and egg nuclei fuse due to ______.
Flowers showing ornithophily show few characteristic like ______.
The flower of the Hibiscus plant is ______
Pollen grains are produced by ______
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Where is the zygote located in the flower after fertilization?
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
Name the reproductive parts of an angiosperm. Where are these parts located? Explain the structure of its male reproductive part.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
