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प्रश्न
The number of nuclei present in a zygote is _______.
पर्याय
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
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Egg laid after fertilisation is made up of a single cell.
What is the name of the reproductive process :
which involves two parents?
Write down the different methods of asexual reproduction.
Match the organisms given in column I with the methods of reproduction/propagation given in column II :
| Column I | Column II | |
| (i) Plasmodium | (a) Spore formation | |
| (ii) Spirogyra | (b) Leaves | |
| (iii) Jasmine | (c) Regeneration | |
| (iv) Apple tree | (d) Budding | |
| (v) Bryophyllum | (e) Binary fission | |
| (vi) Potatoes | (f) Layering | |
| (vii) Rhizopus | (g) Fragmentation | |
| (viii) Hydra | (h) Tubers | |
| (ix) Planaria | (i) Cuttings | |
| (x) Leishmania | (j) Multiple fission | |
| (xi) Sugar cane | (k) Grafting | |
| (xii) Rose |
The characteristics transmitted from parents to offspring are present in :
(a) cytoplasm
(b) ribosome
(c) golgi bodies
(d) genes
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
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 ______.
Match the following:
| Column ‘I’ | Column ‘II’ |
|
(1) Inhibits plant growth
|
(a) Breaks large fat globules into smaller ones
|
|
(2) Cytokinins
|
(b) Auxins
|
|
(3) Cellular respiration
|
(c) Mitochondria
|
|
(4) Bile
|
(d) Promote cell division
|
|
(e) Abscisic acid
|
Explain the term Reproduction.
The example of dicot endospermic seed is ______.
Explain heterostyly and herkogamy with suitable example.
The average period of pregnancy in human lasts for ______ days of pregnancy.
What is the function of inner cell mass?
Name two organisms that reproduce through budding.
Assertion and Reason types of Question.
Assertion: Corm is a condensed form of Bulb.
Reason: It has dry and fleshy scale leaves.
In a flower, the parts that produce male and female gametes (germ cells) are
The term metamorphosis is not used while describing human development. Why?
Which of the following nucleus is unlike other nuclei in the female gametophyte of angiosperms?
