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प्रश्न
Draw a neat and labelled diagram.
Double fertilization in angiosperms
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उत्तर
APPEARS IN
संबंधित प्रश्न
(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 has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
Mature ovary forms the ______.
What is the function of a flower?
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Explain the terms 'cross-pollination'?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
The correct sequence of reproductive stages occurring in flowering plants is ______
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 blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Fill in the blank:
Seeds are formed from________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
What are the male and female gametes in a flowering plant?
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
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.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
What is meant by pollination?
Find the odd one out:
Pollen grains are formed by _________ division in locules of anthers.
Find an odd one out.
Calyx : Sepals : : Corolla : ________________
Write the functions of sepals
The male reproductive part of a flower is ______.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
Which of the following are the chemical components of the wall of pollen tube?
In a flowering plant, archesporium gives rise to ______.
Variations occur as a result of ______
Which out of the following processes does not lead to the formation of clones.
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Where is the zygote located in the flower after fertilization?
State the number of sets of chromosomes present in a zygote.
Double fertilization is exhibited by ______
Sketch and label the essential and accessory whorls of flower.
In a plant flower the female whorl is ______.
What are the agents for pollination?
What is the function of calyx?
