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प्रश्न
What is the function of calyx?
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उत्तर
The main function of calyx is to protect the inner whorls of the flower.
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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?
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
The anther contains ______.
Sketch the reproductive parts of a flower.
The reproductive part of a plant is the ______.
The process of fusion of the male and female gametes is called ______.
What are the reproductive organs in a flower?
Where is the male gamete formed in flowering plants?
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?
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
In what ways is fertilisation in a plant similar to fertilisation in a human?
Fill in the blanks:
A stamen consists of ______ and ________.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
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.
Write the names of male and female reproductive parts of a flower.
What is phototropism?
Describe an activity to demonstrate phototropism.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Mention pollination types.
Bisexual : Hibiscus : : Unisexual : ___________
Write the functions of sepals
Give scientific reason.
Fertilization in plants is called double fertilization.
Distinguish between self-pollination and cross-pollination.
Explain the sexual reproduction process in plants with a diagram.
Write the events involved in the sexual reproduction of a flowering plant.
a. Discuss the first event and write the types.
b. Mention the advantages and the disadvantages of that event.
In which part of the flower germination of pollen grains takes place?
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.
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
In a flowering plant, archesporium gives rise to ______.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
Which out of the following processes does not lead to the formation of clones.
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Where is the zygote located in the flower after fertilization?
The ovaries of different flowers may contain ______.
Explain the post fertilization changes that occur in the ovary of a flower.
