Which among the following is not a wall layer of microsporangium?
(1) Endothecium
(2) Nucellus
(3) Tapetum
(4) Middle layers
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAll of the following statements are correct except:
(1) The proximal end of the filament is attached to the thalamus or the petal of the flower.
(2) The anther is a four-sided structure consisting of four microsporangia, two in each lobe.
(3) The number and length of stamens are variable in flowers of different species.
(4) In a longitudinal section, a typical microsporangium appears near circular in outline.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich among the following statement is incorrect with respect to tapetum?
(1) It nourishes developing pollen grains.
(2) It has dense cytoplasm.
(3) It is the innermost wall layer of microsporangia.
(4) Cells have single nucleus only.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow tapetal cells become binucleate?
(1) Meiosis-I
(2) Mitosis
(3) Endomitosis
(4) Eumitosis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich among the following is incorrect with respect to microsporogenesis?
(1) The cells of the sporogenous tissue undergo mitotic divisions to form microspore tetrads.
(2) Each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell (PMC).
(3) The microspores are arranged in a cluster of four cells called as the microspore tetrad.
(4) Inside each microsporangium several thousands of microspores or pollen grains are formed that are released with the dehiscence of anther.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe inner wall of pollen grains is made up of
(1) Sporopollenin
(2) Cellulose and pectin
(3) Peptidoglycan
(4) Cellulose only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 & Biology