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Question
Name the part made up of the stigma, style and ovary.
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Solution
Pistil contains stigma, style and ovary.
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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:
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A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
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Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
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(iii) ovary,
(iv) egg
What is the name of female part of a flower?
What is the name of female organ of a flower (other than carpel)?
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
What is made in anther of a flower?
How do the insects help in cross-pollination?
How is the process of pollination different from fertilization?
What type of plants reproduce by sexual reproduction method?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
(a) Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
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(e) What is the name of yellow powdery substance present in the anther of a flower?
The length of pollen tube depends on the distance between :
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(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
When an insect sits on the flower of a plant then some particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube b from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of d contained in structure E. the fusion of C and D forms a new cell f which grows and develops into a seed of the plant.
(a) What are particles A? What is the process of transferring A from one flower to another flower of similar plant by the insect known as?
(b) What is the name of tube B?
(c) What is C which moves down through the tube B?
(d) Name D and E.
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Give scientific reason.
Fertilization in plants is called double fertilization.
Distinguish between self-pollination and cross-pollination.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
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| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
Write the events involved in the sexual reproduction of a flowering plant.
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b. Mention the advantages and the disadvantages of that event.
Where does the endothecium layer of anther lobes is present?
The anther wall consists of four wall layers where ______
The 3-celled egg apparatus at the micropylar end comprises of ______
Identify the female gametophyte in angiosperms.
Gloriosa superba exhibits ______.
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 ______
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
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Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
