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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
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
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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