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प्रश्न
Give any two examples of agents of pollination.
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उत्तर
Examples of agents of pollination are:
- Insect pollination: Bees are the most common and recognized insect pollinators.
- Bird pollination: Plants are pollinated by some birds, particularly hummingbirds.
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
(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?
Give one example of a unisexual flower.
State the function of flowers in the flowering plants.
A flower may have either male or female reproductive parts. Such a flower is called ______.
Where is the male gamete formed in flowering plants?
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
How is the process of pollination different from fertilization?
Give some examples of different modes of fertilisation in nature?
Name the part of a seed which contains stored food.
Name the part of a seed which grows into root.
(a) Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
(b) What name is given to (i) all the petals of a flower, and (ii) all the sepals of a flower?
(c) What are (i) stamen, and (ii) carpel, in a flower?
(d) What is the other name of carpel of a flower?
(e) What is the name of yellow powdery substance present in the anther of a flower?
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
The correct sequence of reproductive stages occurring in flowering plants is ______
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
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
Reproductive whorls of a flower are:
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
What part is played by stamens and carpels in reproduction?
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Prepare a slogan for campaign against female foeticide.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
Find an odd one out.
Bisexual : Hibiscus : : Unisexual : ___________
Write the functions of sepals
Explain the sexual reproduction process in plants with a diagram.
Where does the endothecium layer of anther lobes is present?
The ovule of an angiosperm is technically equivalent to ______
Identify the female gametophyte in angiosperms.
Gloriosa superba exhibits ______.
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Double fertilization is exhibited by ______
What is the structural unit of sexual reproduction in plant?
What are the agents for pollination?
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
 |
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
