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प्रश्न
Why anther is called as tetrasporangiate structure?
उत्तर
Due to the presence of four pollen sacs in dithecus anther, it is called as tetrasporangiate structure.
संबंधित प्रश्न
How does binary fission differ from multiple fission?
The ability of a cell to divide into several cells during reproduction in Plasmodium is called :
(a) budding
(b) fragmentation
(c) binary fission
(d) multiple fission
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]?
Fill in the blank:
Binary fission produces cells of ________ size.
Choose the correct alternative and rewrite the following:
Fermentation is a type of ____________________.
Name two flowering plants that reproduce both by seeds and by vegetative means.
Distinguish between sexual and asexual reproduction.
Asexual reproduction is also known as ______.
In Spirogyra, asexual reproduction takes place by ______
Seed formation without fertilization in flowering plants involves the process of ______.
