51.

53.

84.

55.

56.

57.

88.

89.

60.

A keystone species <
(A) Exert great influence on structure of ecosystem
‏مک رت‎ great influence on functioning of 20085 ‏جا ماق‎
യ Both (A) and (B)
(1)) None of the above

System for the control of hunger and thirst are linked with the —————— of the brain :
(ಗ) Pituitary (B) Hypothalamus
(C) Thalamus 1) All the above
The frequency distribution for nominal fordinal data :
(^) Bar chart (B) Histogram
(C) Frequency நண்ண (D) All the gbove
Principle of competitive exclusion was given by :
(வ E.P.Odum (0) G.F. Gause
(0 च. H. Conell M) E.F.Clements

Which of the following is true :
‏بی‎ Ina wild life sanctuary human activities are not allowed
(वि) In a national park human activities are not allowed
(C) Both (A) and (B)
(D) None

Zero population growth occurs when :
(ഇ Death rate equals hirth rate and net migration is zera
(B) Death rate is greater than birth rate and net migration is zero
(©) Death rate is lesser than birth rate and net migration is zero
(D) All the above

Classical conditioning is reinforced when the ————— follows ‏عط‎
‎(ಗಿ) Conditioned Stimulus, Unconditioned Stimulus
(B) Unconditicned Response, Conditioned Response
(0) Conditioned Stimulus, Conditioned Response
(D) Unconditioned Stimulus, Conditioned Stimulus

A stable community of a sere is :
(^) Seral community (B) Lithosere
(0 Climax community (11) Xerosere

Which of the following is not true for green house gases :

(A) COq, methane, CFC 1) CO3 methane, Ozone
(ര ‏0ت‎ water vapour, CFC (D) COg, nitrous oxide, Oxygen
The following is not a major cause of species extinetion :
(ಗ) Habitat loss (B) Hunting and poaching
(C) Fire 3 (1)) . ೫೦೫೦ 8700108
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