The stamen is the male reproductive organ of a flower, and it consists of two main parts: the filament and the anther. The filament is a slender, thread-like structure that supports the anther, which contains the pollen grains.
The filament serves to elevate the anther and position it in a way that facilitates the dispersal of pollen. It is the structure that connects the anther to the rest of the flower, allowing the anther to be positioned for effective pollination.
Therefore, the correct answer for the stalk of the stamen is (B) Filament.
The correct answer is:
Option 2: Filament
The filament is the stalk of the stamen, which is the male reproductive organ of a flower. The stamen consists of two parts:
Anther: The part that produces pollen.
Filament: The stalk that supports the anther and holds it in place.
The other options are incorrect because:
Peduncle (Option 1) is the main stalk of the entire flower or inflorescence.
Pedicel (Option 3) is the stalk that supports an individual flower in an inflorescence.
Petiole (Option 4) is the stalk of a leaf, not the stamen.
Thus, the filament is the stalk of the stamen.
A block of certain mass is placed on a rough floor. The coefficients of static and kinetic friction between the block and the floor are 0.4 and 0.25 respectively. A constant horizontal force \( F = 20 \, \text{N} \) acts on it so that the velocity of the block varies with time according to the following graph. The mass of the block is nearly (Take \( g = 10 \, \text{m/s}^2 \)):
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