A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
In branched filament, the branch arises as a lateral outgrowth when occasional cell in a filament divides in a second plane. In the heterotrichous filament branching of filament reaches the climax. It is the most advanced and elaborate type of plant body in the green algae and is found in the chaetophorales. In the evolutionary transition from the filament, a portion of the filamentous algal thallus developed vertically while the rest which constituted the basal part remained prostrate. The thallus in this case is thus divided into two parts, prostrate system and projecting system.
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