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प्रश्न
Bisexual : Hibiscus : : Unisexual : ___________
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उत्तर
Bisexual : Hibiscus : : Unisexual : Papaya
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संबंधित प्रश्न
Name the parts labelled as A, B, C and D in the diagram given below:
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
State the function of flowers in the flowering plants.
The process of fusion of the male and female gametes is called ______.
What are the reproductive organs in a flower?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
How do the insects help in cross-pollination?
Explain the term 'fertilisation'.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
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 the figure given alongside, the parts marked A, B and C are sequentially:
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Mention the function of Stigma.
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.
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.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
What is phototropism?
Prepare a slogan for campaign against female foeticide.
Answer the following question.
How does suitable pollination lead to fertilization?
Differentiate between self-pollination and cross-pollination.
Answer the following question.
List two agents of pollination?
Which of the following is the outermost protective layer of anther?
Identify the female gametophyte in angiosperms.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
The seed that contains the future plant is called the ______
Length of pollen tube depends on the distance between ______
State the number of sets of chromosomes present in a zygote.
Give any two examples of agents of pollination.
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
The pollen tube usually enters the embryo sac ______.
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.
State the post-fertilisation changes that lead to fruit formation in plants.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
