Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which among the following is not a feature of anther?
Being apocarpous is a feature of pistil and not anther. When there are more than one pistil, they may be fused together (syncarpous) or may be free (apocarpous).
Which among the following is not a wall layer of microsporangium?
Nucellus is present in female reproductive part of plant- ovule.
All of the following statements are correct except:
(4) In a transverse section, a typical microsporangium appears near circular in outline.
Which among the following statement is incorrect with respect to tapetum?
The innermost wall layer is the tapetum. It nourishes the developing pollen grains. Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.
How tapetal cells become binucleate?
Tapetal cells generally have more than one nucleus. They become bi-nucleate by multiple cell fusions of unicellular cells, this is referred to as endomitosis.
Which among the following is incorrect with respect to microsporogenesis?
The cells of sporogenous tissue undergo meiotic divisions to form microspore tetrads.
The inner wall of pollen grains is made up of
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin. (page- 23)
The pollen grains are shed at two-celled stage in
In over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage. In the remaining species, the generative cell divides mitotically to give rise to the two male gametes before pollen grains are shed (3-celled stage).
Which among the following is referred to as male gametophyte?
The pollen grains represent the male gametophytes.
Which among the following is incorrect with respect to vegetative cell of pollen grain?
Generative cell is small and spindle-shaped with dense cytoplasm.
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