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NEET Revision Notes

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Q.1. 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
Ans: 
d
Solution:

Pneumatophores are respiratory roots belonging to Mangrove plants.
 Notes | EduRev
Q.2. 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
Ans: 
c
Solution:

The parasitic 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.
 Notes | EduRev
Q.3. 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
Ans: 
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, adventitious roots and a terminal bud.

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