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प्रश्न
Explain the term Reproduction.
उत्तर
The fundamental characteristics of living things to produce new individuals of the same species, that is a new generation of the species from an existing individual is known as reproduction.
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संबंधित प्रश्न
Define reproduction.
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Why is variation beneficial to the species but not necessarily for the individual?
Explain the importance of reproduction in organisms.
Match items in Column I with those in Column II:
| Column I | Column II | ||
| (a) | Bud | (i) | Maple |
| (b) | Eyes | (ii) | Spirogyra |
| (c) | Fragmentation | (iii) | Yeast |
| (d) | Wings | (iv) | Bread mould |
| (e) | Spores | (v) | Potato |
| (vi) | Rose |
Find the odd one out:
Amoeba, Euglena, Planaria, Paramoecium
What is the name of the reproductive process :
which involves only one parent?
Which type of reproduction :
involves gametes?
Which type of reproduction :
does not involve gametes?
Asexual reproduction is :
(a) a fusion of specialised cells
(b) a method by which all types of organisms reproduce
(c) a method producing genetically identical offspring
(d) a method in which more than one parent are involved
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)
The method of asexual reproduction in plants in which callus is produced is :
Imagine all the seeds produced by a plant happen to fall under the same plant and sprout into new plants. Mention any two problems that will be faced by the new plants.
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
Differentiate between the following:
Asexual reproduction and sexual reproduction.
List any two different forms asexual reproduction.
Write the full form of DNA.
What do you mean by ‘Connecting Links’? Give one example.
Multiple choice question.
Insect pollinated flowers usually posses ______
Which of the following types require pollinator but the result is genetically similar to autogamy?
If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes?
Sporoderm is made up of ______.
The single shield-shaped cotyledon in monocot seed is known as ______.
Draw a well labelled diagram of T.S. anther.
Nebenkern is ______.
Nervous system develops from ______ of embryonic layer.
The average period of pregnancy in human lasts for ______ days of pregnancy.
What is morula?
Write two types of reproduction in plants.
What will happen if you cut planaria into small fragments?
Identify the chromosome number of the endosperm in the following case. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12.
Identify the homologous pair.
Which of the following nucleus is unlike other nuclei in the female gametophyte of angiosperms?
Give reason for the following:
All multicellular organisms cannot give rise to new individuals through fragmentation or regeneration.
