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प्रश्न
Calyx : Sepals : : Corolla : ________________
उत्तर
Calyx : Sepals : : Corolla : Petals
APPEARS IN
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 identified the various parts of an embryo of a gram seed and listed them as given below :
(I) Testa
(II) Plumule
(III) Radicle
(IV) Cotyledon
(V) Tegmen
Out of these the actual parts of the embryo are :
(A) I, II, III
(B) II, III, IV
(C) III, IV, V
(D) II, IV, V
Give one example of a unisexual flower.
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
Fill in the following blank with suitable word :
The male 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?
Name the part of a seed which grows into shoot.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
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?
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
Mention the function of 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
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.
“Cell division is a type of reproduction in unicellular organism.” Justify.
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
What is pollination? Mention its types.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Define.
Inflorescence
Write the functions of sepals
Observe the figure below. Write functions of the labelled parts.
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 |
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Antipodal cells are present towards the ______ in an anatropous ovule.
In human beings, fertilization occurs in the ______
Pollen grains are produced by ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Given below is a diagram of a germinating seed. Label the parts that:
- gives rise to future shoot.
- gives rise to future root system.
- stores food.
