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प्रश्न
Asexual reproduction occurs by __________ cell division.
विकल्प
mitotic
meiotic
fertilization
double fertilization
उत्तर
Asexual reproduction occurs by mitotic cell division.
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संबंधित प्रश्न
Vegetative propagation takes place with the help of leaves in _________ plant.
What happens when a Planaria gets cut into two pieces?
Name the following : 'Blobs' that develop at the tips of the non-reproductive threads in Rhizopus.
External fertilisation takes place in frogs.
A student in viewing under a microscope a permanent slide showing various stages of asexual reproduction by budding in yeast. Draw diagrams of what he observes (in proper sequence)
Name the natural method by which strawberry plants are propagated.
Name three common methods which are used for the artificial propagation of plants.
what is the name of the process by which Amoeba reproduces?
Name any four types of ornamental plants which are being produced by tissue culture technique.
What care should be taken while making a cutting from a plant?
An animal which reproduces by the process of budding is :
(a) Plasmodium
(b) yeast
(c) Hydra
(d) Planaria
An alga which reproduces by the asexual reproduction method called fragmentation is :
(a) Rhizopus
(b) Salmonella
(c) Plasmodium
(d) Spirogyra
A scientist removed some cells from the growing point of a plant and placed it in a suitable medium leading to the formation of a shapeless lump of mass X. X is then transferred to another medium which stimulates it to develop roots. When X with developed roots is placed in a yet another medium, then it develops shoots to form tiny plantlets. These plantlets can then be transplanted in pots or soil where they can grow to form mature plants.
(a) What is the shapeless lump of mass X known as?
(b) What name is given to this method of producing new plants?
(c) The growth medium used in this method contains plant nutrients in the form of a 'jelly'. Name this jelly.
(d) What is the general name of chemicals used to stimulate the growth of plant cells and development of roots and shoots?
(e) Name any two plants which are produced by this method.
(f) State any two advantages of this method of producing plants.
(g) What is the other name of this method [other then that given in (b) above]?
Why is it disadvantageous to grow plants vegetatively?
Write a short note on Vegetative reproduction.
Multiple choice question. Tick (✓) the correct choice:
The common method of reproduction in bacteria is
- budding
- fragmentation
- binary fission
- all the above
Fill in the blank:
Budding produces cells of __________ size.
Fill in the blank:
Fungi, ferns and mosses reproduce by ____________________.
Mention the common method of reproduction in Dahlia.
What happens when a mature spirogyra filament attains considerable length?
Name a multicellular organism which reproduces by fragmentation method.
Fill in the blanks and rewrite the completed statements:
___________ acid inhibits growth leading to wilting of leaves.
Choose the correct alternative and rewrite the following:
Ramesh observed a slide of Amoeba with elongated nuclei. It would represent _______________.
In hydra the type of reproduction is ___________.
Why is chemical communication better than electrical impulses as a means of communication between cells in a multi-cellular organism?
What do you understand by hybridisation?
How is plant hybridisation as a technique beneficial?
Porogamy refers to entry of pollen tube through ____________.
Explain the development of male gametophyte in angiosperms (diagram is not expected).
Distinguish between sexual and asexual reproduction.
The asexual reproduction in bacteria occurs by ______.
Spirogyra reproduce by ______
The ability of an organism to develop a whole body from a broken piece or fragment is called ______
Offspring formed by asexual method of reproduction have greater similarity among themselves because
- asexual reproduction involves only one parent
- asexual reproduction does not involve gametes
- asexual reproduction occurs before sexual reproduction
- asexual reproduction occurs after sexual reproduction
Length of pollen tube depends on the distance between
When one of the following is correctly matched?
Plants like (vlmus), Dandelion (Taraxacum) and members of Rose family vegetative reproduce by ______.
