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प्रश्न
The number of meiotic and mitotic divisions necessary for development of female gametophyte in angiosperms is ______.
पर्याय
1 meiosis and 2 mitosis
1 mitosis and 3 meiosis
1 meiosis and 1 mitosis
1 meiosis and 3 mitosis.
उत्तर
The number of meiotic and mitotic divisions necessary for development of female gametophyte in angiosperms is 1 meiosis and 3 mitosis.
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संबंधित प्रश्न
Explain the importance of reproduction in organisms.
Amoeba reproduces by budding.
What is meant by reproduction?
In the list of organisms given below, those which reproduce by the asexual method are :
(i) banana
(ii) yak
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)
Reproduction is essential for living organisms in order to ______
Name two animals which undergo internal fertilisation?
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
What do you mean by ‘Connecting Links’? Give one example.
Explain the term: Pollination.
Answer the following question.
The growing size of the human population is a cause of concern for all people. The rate of birth and death in a given population will determine its size. Reproduction is the process by which organisms increase their population. The process of sexual maturation for reproduction is gradual and takes place while general body growth is still going on. Some degree of sexual maturation does not necessarily mean that the mind or body is ready for sexual acts or for having and bringing up children. Various contraceptive devices are being used by human beings to control the size of the population.
(a) List two common signs of sexual maturation in boys and girls.
(b) What is the result of reckless female foeticide?
(c) Which contraceptive method changes the hormonal balance of the body?
(d) Write two factors that determine the size of a population.
Multiple choice question.
Presence of beard in boys is a _______.
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Which of the following is diploid at the time of fertilization in a gametophyte of a normal angiosperm?
Explain the term reproduction.
How is reproduction in Hydra different from that in Amoeba?
Observe the following figures.
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 |
 |
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| (a) | (b) | (c) | (d) |
- Identify the stages (a) to (d) in figure during development of human baby.
- Arrange the stages in correct sequence of development.
- Explain the development that takes place in any one stage.
Which of the following nucleus is unlike other nuclei in the female gametophyte of angiosperms?
