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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
Name the scientist who put forward the most popular model of DNA.
Draw a diagram of DNA showing genes.
Where is DNA found in a cell ?
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
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 |
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 only one parent?
Which type of reproduction :
involves gametes?
Fill in the following blank with suitable word :
the process of...........ensures continuity of life on earth.
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 |
Reproduction is essential for living organisms in order to ______
What type of fertilisation takes place in fish?
What type of fertilisation takes place in birds?
Why is reproduction necessary for living organisms?
Write the full form of DNA.
Name the part of the cell where DNA is located?
Bryophyllum can reproduce by its ______.
Give reason for the following:
Vegetative propagation is practised for growing only some type of plants.
The daughter cells produced by asexual reproduction are genetically identical to the parent cell.
Multiple choice question.
Insect pollinated flowers usually posses ______
Multiple choice question.
Point out the odd one.
The number of nuclei present in a zygote is _______.
The number of meiotic and mitotic divisions necessary for development of female gametophyte in angiosperms is ______.
Identify the odd one with respect to pollinating agent.
______ is an example of helobial endosperm.
The single shield-shaped cotyledon in monocot seed is known as ______.
Draw a well labelled diagram of the monocot seed you have studied.
Seminal fluid is ______ in nature.
The average period of pregnancy in human lasts for ______ days of pregnancy.
What is the use of tablet ‘Saheli’?
Reproductive part of a plant is ______.
Write two types of reproduction in plants.
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.
Explain the term reproduction.
Assertion and Reason types of Question.
Assertion: In Banyan prop roots grow horizontally from the tree.
Reason: They give additional support to the tree.
The statement ‘nothing lives forever, yet life continues’ illustrates the role of ______.
Give reason for the following:
All multicellular organisms cannot give rise to new individuals through fragmentation or regeneration.
