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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.
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 A, B and C shown in the following diagram and state one function of each.
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
Give one example of a unisexual flower.
Mention the changes a flower undergoes after fertilisation.
Sketch the reproductive parts of a flower.
The process of fusion of the male and female gametes is called ______.
State the name of the functional unit concerned with sexual reproduction.
What is the function of a flower?
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(a) pollination, fertilisation, seed, embryo
(b) seed, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seed
(d) embryo, seed, pollination, fertilisation
The correct sequence of reproductive stages occurring in flowering plants is ______.
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Fill in the blank:
Seeds are formed from________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Mention the function of Flower.
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.
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
Explain sexual reproduction in plants.
Prepare a slogan for campaign against female foeticide.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
__________ is present in unisexual flower.
What does germination mean?
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
The essential parts of a flower are ______.
Where does the endothecium layer of anther lobes is present?
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Flowers showing ornithophily show few characteristic like ______.
Pineapple fruit develops from ______.
The flower of the Hibiscus plant is ______
The seed that contains the future plant is called the ______
Variations occur as a result of ______
Where is the zygote located in the flower after fertilization?
Type of sexual reproduction is ______.
State the post-fertilisation changes that lead to fruit formation in plants.
