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प्रश्न
Pollen grains from anther are transferred to the stigma.
विकल्प
True
False
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उत्तर
True
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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?
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
State significance of pollination.
Name and differentiate between the two modes of pollination in flowering plants.
Give one example of a unisexual flower.
State the function of flowers in the flowering plants.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
What type of plants reproduce by sexual reproduction method?
Name the part of a seed which grows into shoot.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
In the figure given alongside, the parts marked A, B and C are sequentially:
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?
Fill in the blank by selecting suitable word:
A flower that bears both the male and the female parts is known as __________ flower.
Mention the function of Flower.
Mention the function of Anther.
What are the male and female gametes in a flowering plant?
What part is played by stamens and carpels in reproduction?
Draw a labelled diagram of a bisexual flower.
The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :
A. Soak the seeds in plain water and keep them overnight.
B. Cut open the soaked seed and observe its different parts.
C. Take some healthy seeds in a petri-dish.
D. Drain the excess water, cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(a) C, A, D, B
(b) C, D, A, B
(c) A, C, D, B
(d) A, C, B, D
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Prepare a slogan for campaign against female foeticide.
Mention pollination types.
What is meant by pollination?
Answer the following question.
List two agents of pollination?
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Observe the figure below. Write functions of the labelled parts.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
The ovule of an angiosperm is technically equivalent to ______
How many middle layers are generally present in the wall of the anther lobes?
Variations occur as a result of ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Triple fusion involves ______.
State the post-fertilisation changes that lead to fruit formation in plants.
