Man and His Environment — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#9 Which of the following is not recycled in the ecosystem?
A) Carbon
B) Sulphur
C) Energy
D) Water
#10 The study of human and things that affect them is called
A) Angiography
B) Mammography
C) Homography
D) Demography
#11 The conditions under which an organism lives is called its
A) Environment
B) Surroundings
C) Space
D) Atmosphere
#12 Which of the following bacteria forms symbiotic association with roots of leguminous plants?
A) Azobactor
B) Clostridium
C) Anabaena
D) Rhizobium
#13 The oxidation of ammonium compounds to nitrites and then to nitrates by the nitrifying bacteria, is called
A) Ammonification
B) Nitrification
C) Denitrification
D) Decomposition
#14 There are three types of pyrimids of number of biomass and
A) Of plants
B) Of animals
C) Of energy
D) of Weight
#15 Plant succession starting on relatively shallow water is
A) Xerosere
B) Mesosere
C) Hydrosere
D) None of these
#16 The number of individual organism per unit area is
A) Population size
B) Population density
C) Demographics
D) None of these
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