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प्रश्न
Multiple choice question.
In angiosperms, endosperm is formed by/ due to ______
पर्याय
free nuclear divisions of megaspore
polar nuclei
polar nuclei and male gamete
synergids and male gamete
उत्तर
In angiosperms, endosperm is formed by/ due to polar nuclei and male gamete.
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संबंधित प्रश्न
What is DNA?
Where is DNA found in a cell ?
Explain the importance of reproduction in organisms.
A spore-producing organism is ______.
What is the name of the reproductive process :
which involves two parents?
Why are budding, fragmentation and regeneration, all considered to be asexual type of reproduction?
Which of the following organisms reproduce by sexual method and which by asexual method?
Amoeba, Cats, Humans, Hydra, Birds
The method of asexual reproduction in plants in which callus is produced is :
Name two animals which undergo internal fertilisation?
State whether the following statement is true (T) or false (F):
Most organisms have the capacity of regeneration in some or the other way.
Define the following:
Regeneration
Differentiate between the following:
Asexual reproduction and sexual reproduction.
Explain the role of DNA in the process of reproduction of the cell.
Explain the term Reproduction.
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.
Insect pollinated flowers usually posses ______
Self-incompatibility is found in flowers of plants _______.
______ is an example of helobial endosperm.
Which of the following statements about reproduction in humans is correct?
The statement ‘nothing lives forever, yet life continues’ illustrates the role of ______.
