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प्रश्न
Accessory whorls : Calyx and corolla : : essential whorls : ______________
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उत्तर
Accessory whorls : Calyx and corolla : : essential whorls : Androecium and gynoecium
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संबंधित प्रश्न
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 labelled as A, B, C and D in the diagram given below:
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
Explain what you understand by sexual reproduction.
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
The female organ of reproduction in the flower is the...........
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 meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
The correct sequence of reproductive stages occurring in flowering plants is ______
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Fill in the blank by selecting suitable word:
A flower that bears both the male and the female parts is known as __________ flower.
Fill in the blanks:
A stamen consists of ______ and ________.
Fill in the blank:
Seeds are formed from________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.
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.
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.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Answer the following question.
List two agents of pollination?
Find an odd one out.
What does germination mean?
The essential parts of a flower are ______.
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
The seed that contains the future plant is called the ______
The process of release of eggs from the ovary is called ______
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
The ovaries of different flowers may contain ______.
State the post-fertilisation changes that lead to fruit formation in plants.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
