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प्रश्न
Explain the term: Pollination.
उत्तर
The process of transfer of pollen grains from anther to stigma is called pollination.
संबंधित प्रश्न
What do you mean by DNA?
Define reproduction.
What is DNA copying?
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?
A spore-producing organism is ______.
Which life process ensures that a plant or animal species will not disappear from this earth?
What is the name of the reproductive process :
which involves two parents?
Which type of reproduction :
does not involve gametes?
Fill in the following blank with suitable word :
the process of...........ensures continuity of life on earth.
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 :
Name two animals which undergo internal fertilisation?
What type of fertilisation takes place in fish?
State whether the following statement is true (T) or false (F):
Producing life is called respiration.
Why is reproduction necessary for living organisms?
List any two different forms asexual reproduction.
Write the full form of DNA.
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
|
By which process do green plants synthesize their food?
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.
Sporoderm is made up of ______.
Identify the odd one with respect to pollinating agent.
Self-incompatibility is found in flowers of plants _______.
The example of dicot endospermic seed is ______.
Which is the most common type of endosperm in angiospermic families?
Draw a well labelled diagram of T.S. anther.
Draw a well labelled diagram of the monocot seed you have studied.
Which of the following is not a part of the uterus?
The average period of pregnancy in human lasts for ______ days of pregnancy.
Reproductive part of a plant is ______.
Write two types of reproduction in plants.
The plant which propagates with the help of its leaves is ______.
Match the following.
| Column I | Column II |
| Fission | Spirogyra |
| Budding | Amoeba |
| Fragmentation | Yeast |
What will happen if you cut planaria into small fragments?
Name two organisms that reproduce through budding.
Identify the homologous pair.
Assertion and Reason types of Question.
Assertion: In potatoes, shoot arises from eyes.
Reason: Eyes represent the buds.
How is reproduction in Hydra different from that in Amoeba?
Which of the following nucleus is unlike other nuclei in the female gametophyte of angiosperms?
The statement ‘nothing lives forever, yet life continues’ illustrates the role of ______.
