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प्रश्न
The number of nuclei present in a zygote is _______.
विकल्प
two
one
four
eight
उत्तर
The number of nuclei present in a zygote is two.
Explanation:
The zygote is a single cell which contains a single nucleus and is produced by the fusion of two nuclei from the egg and sperm cell respectively.
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संबंधित प्रश्न
Explain the importance of reproduction in organisms.
Amoeba reproduces by budding.
A spore-producing organism is ______.
Which life process ensures that a plant or animal species will not disappear from this earth?
What are the two general methods of reproduction in organisms?
The offsprings formed by asexual reproduction method have greater similarity among themselves because :
(i) asexual reproduction involves only one parent
(ii) asexual reproduction involves two parents
(iii) asexual reproduction involves gametes
(iv) asexual reproduction does not involve gametes
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)The offsprings formed by asexual reproduction method have greater similarity among themselves because :
(i) asexual reproduction involves only one parent
(ii) asexual reproduction involves two parents
(iii) asexual reproduction involves gametes
(iv) asexual reproduction does not involve gametes
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
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.
Bryophyllum can reproduce by its ______.
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.
The ploidy level is not the same in ______.
What is hilum with respect to ovule?
Draw a well labelled diagram of the monocot seed you have studied.
The average period of pregnancy in human lasts for ______ days of pregnancy.
Which of the following is diploid at the time of fertilization in a gametophyte of a normal angiosperm?
In a flower, the parts that produce male and female gametes (germ cells) are
