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Solved Examples on Morphology of Flowering Plants

Question1: Pneumatophores or breathing roots occur in [CPMT 1984, 93; BHU 1984, 90; RPMT 1985; AIIMS 1985; APMEE 1999]

(a)      Hydrophytes        

(b)      Epiphytes   

(c)       Xerophytes            

(d)      Mangrove plants

Answer: d

Solution:

Pneumatophores are respiratory roots belonging to Mangrove plants.

Question2: Haustoria or sucking roots occur in [CPMT 1978; BHU 1996; DPMT 1999; JIPMER 1999; Pb. PMT 1999]

(a)      Betel 

(b)      Orchids       

(c)       Cuscuta        

(d)      Tinospora

Answer: c

Solution:

The parasatic plant produces some knob like roots at the point of attachment with the host plant known as haustoria which penetrate into the host plant and draws nourishment.

 

Question3: Ginger is a stem which can be differentiated from root because it [CPMT 1978; 83; AFMC 1978, 85; BHU 1981; DPMT 1982; JIPMER 1986]

(a)     Grows parallel to ground         

(b)     Stores food

(c)     Lacks chlorophyll           

(d)     Has nodes and internodes

Answer: d

Solution:

A rhizome is a thick horizontally growing stem. It usually stores food material. It has nodes and internodes as well as scale leaves, axillary buds, adventitous roots and a terminal bud.

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