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Which among the following is attached to the proximal end of filament?
Two parts of a typical stamen are – the long and slender stalk called the filament, and the terminal generally bilobed structure called the anther. The proximal end of the filament is attached to the thalamus or the petal of the flower.
A typical angiosperm bilobed and dithecous anther consists of how many theca?
Each anther is bilobed and each lobe is dithecous i.e. four theca are present in a typical angiosperm anther.
What is the number of microsporangia in each lobe of an angiosperm anther?
The anther is a four-sided (tetragonal) structure consisting of four microsporangia located at the corners, two in each lobe.
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)
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.