B:-May be up or inverted
C:-Always inverted
D:-None of the above
Correct Answer:- Option-A
Question59:-Succession initiated on large sand deposites or desert is called
A:-Hydrosere
B:-Psammosere
C:-Xerosere
D:-Halosere
Correct Answer:- Option-B
Question60:-The head quarters of IUCN
A:-Switzerland
B:-Paris
C:-Vienna
D:-Newyork
Correct Answer:- Option-A
Question61:-Which group of vertebrates comprises the highest number of endangered species?
A:-Fishes
B:-Birds
C:-Mammals
D:-Reptiles
Correct Answer:- Option-C
Question62:-Earth summit was held at
A:-Stockholm in 1992
B:-Paris in 1992
C:-New York in 1992
D:-Rio de Jenerio 1992
Correct Answer:- Option-D
Question63:-A high BOD (Biochemical Oxygen Demand) indicate that
A:-Wateris pure
B:-Absence of microbial activity
C:-High level of oxygen
D:-Low level of oxygen
Correct Answer:-Question Cancelled
Question64:-If the stronger partner is benefited and weak partner is damaged, it is known as
A:-Allelopathy
B:-Symbiosis
C:-Predation
D:-Commensalism
Correct Answer:- Option-C
Question65:-Bacterial cell wall is made up of
A:-Chitin
B:-Cellulose
C:-Dextrin
D:-Peptidoglycan
Correct Answer:- Option-D
Question66:-The extra chromosomal, circular, double stranded self replicating DNA molecule in bacteria is called
A:-Cosmid
B:-Phagemid
C:-Plasmid
D:-Phasmid
Correct Answer:- Option-C
Question67:-The initial complement component that is bound by complement antibodies is

ണ്ടേ Answer:- Option-A
Question68:-CDB is the marker of