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191.

The serotinous cones show:

A.	In situ seed germination	B.	Longer viability
C.	early cone separation	D.	All these characters

192.

When cane plants grown in the forest, they scamble over other vegetation and this corresponds to:

A.	Commensalism	B.	Competition
C.	Exploitation	D.	None of these

193.

As an adaptation to fire, some plants produce lignotubres which are:

A.	Borne on the leaves	B.	Borne underground
C.	Present on the main stem	D.	Suspended from the branches

194.

The interspecific competition is also called:

A.	Interference competition	B.	Scramble competition
C.	Allelopathy	D.	Synnecrosis

195.

The relationship between the alga Microcystis and the surrounding fauna corresponds to:

A.	Amensalism	B.	Parasitism
C.	Predation	D.	Exploitation

196.

The most interfering biotic components are:

A.	Birds	B.	Herbivores
C.	Hunters	D.	Human beings

197.

Those chemicals, which are released by one organism but they destroy the other organism are precisely called:

A.	Allomones	B.	Allelochemics
C.	Kairomones	D.	Depresants

198.

Which of the following plants does not show predation?

A.	Darlingtonia	B.	Viscum
C.	Both (a) & (b)	D.	Cephalotus

199.

Those chemicals which are produced by plants and affect other plants are broadly called:

A.	Depresants	B.	Allomones
C.	Allelochemics	D.	Kairomones

200.

The type of relationship where weaker partner is benefitted and stronger remains unaffected is sometime called:

A.	Allotropy	B.	Allelopathy
C.	Synnecrosis	D.	Allolimy