The pollen grains are shed at two-celled stage in
(1) 80% angiosperms
(2) 40% angiosperms
(3) 30% angiosperms
(4) 60% angiosperms
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich among the following is referred to as male gametophyte?
(1)Stamen
(2) Anther
(3) Pollen grain
(4) microsporangia
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich among the following is incorrect with respect to vegetative cell of pollen grain?
(1) It has irregularly shaped nucleus.
(2) It has abundant food reserve.
(3) It is spindle shaped with dense cytoplasm.
(4) It is bigger as compared to generative cell.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA, B, C and D in the following diagram respectively are:
(1) Epidermis, endothecium, middle layers, tapetum
(2) Epidermis, middle layers, PMC, tapetum
(3) Endothecium, middle layers, microspore mother cells, tapetum
(4) Epidermis, middle layers, tapetum, PMC
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following:
1 |
Male gametophyte |
I |
Embryo sac |
2 |
Female gametophyte |
II |
Ovule |
3 |
Megasporangium |
III |
Pollen grains |
4 |
Microsporangium
|
IV |
Pollen sacs |
(1) 1-III ; 2-I ; 3-II ; 4-IV
(2) 1-I ; 2-II ; 3-III ; 4-IV
(3) 1-IV ; 2-III ; 3-II ; 4-I
(4) 1-III ; 2-II ; 3-I ; 4-IV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe following figure represents :
(1) Transverse section of young anther
(2) 3-D cut section of mature anther
(3) Cut section of filament
(4) Transverse section of mature filament
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe diameter of pollen grain generally varies from:
(1) 40-50 micrometers
(2) 25-50 micrometers
(3) 10-12 micrometers
(4) 8-25 micrometers
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe outer layer exine is made up of:
(1) Cellulose and pectin
(2) Peptidoglycan
(3) Cellulose
(4) Sporopollenin
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich among the following is not a characteristic feature of sporopollenin?
(1) Sporopollenin is one of the most resistant organic material known.
(2) It can withstand high pressures.
(3) No enzyme that degrades sporopollenin is known.
(4) The exine exhibits a fascinating array of patterns and designs.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify A, B and X :-
X contains two cells - A and B. B is bigger than A, it has abundant food reserve and large irregularly shaped nucleus. A is small and floats in the cytoplasm of B. It is spindle shaped with dense cytoplasm and nucleus.
|
A |
B |
X |
(1) |
Vegetative cell |
Generative cell |
Pollen grain |
(2) |
Generative cell |
Vegetative cell |
Pollen grain |
(3) |
Generative cell |
Vegetative cell |
Anther |
(4) |
Generative cell |
Vegetative cell |
Filament |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology