24. The name 'Silent
Valley' is given because of absence of
(A) Grass hoppers
(B) Cicadas
(C) Termites
(D) Wood peckers
25. According to Bowen's
reaction series,the sequence of crystalization of minerals in a discontinuous
series from the melt is
(A) Biotite → Amphibole →Pyroxene →Olivine
(B) Amphibole →Biotite → OlivinePyroxene
(C) Pyroxene → Olivine →Biotite →Amphibole
(D) Olivine → Pyroxene →Amphibole → Biotite
26. Different types of
ecosystem constitute
(A) Biome
(B) Species
(C) Community
(D) Biosphere
27. Population density is
expressed by
(A) D = N + S
(B) D = N ÷ S
(C) D = N – S
(D) D = N×S
28. Archaeopteryx links
between
(A) Human being and Monkey
(B) Insects and Earthworm
(C) Reptiles and Bats
(D) Reptiles and birds
29. Bacillus
thuringiensis is a
(A) Fungus
(B) Protozoan
(C) Alga
(D) Biopesticide
30. The following
statistical devise helps in analysing the co-variation
(A) Correlation
(B) Regression
(C) Median
(D) Standard deviation
31. The following is not
a measure of central tendency
(A) Mode
(B) Standard deviation
(C) Median
(D) Harmonic mean
32. Biogeochemical cycles
involve in
(A) Cycling of water
(B) Cycling of gases
(C) Cycling of energy
(D) Cycling of nutrients
33. Anabaena is a
(A) Eukaryote
(B) Archaebacteria
(C) Protozoa
(D) Cyanobacterium
34. The following gas
produced from the paddy fields is responsible for global warming
(A) Methane
(B) Chlorine
(C) CO2
(D) H2S
35. Forests of the river
delta are called
(A) Social forests
(B) Farm forests
(C) Scrub jungles
(D) Mangroves
36. Which of the World
Summit proposed to save the earth from global warming ?
(A) Earth Summit
(B) Rottendam Convention
(C) Stockholm Convention
(D) Copenhagen Summit
37. The linear roll back
model used for air quality modeling is
(A) A time series model
(B) A receptor-oriented model
(C) A deterministic model
(D) An empirical-statistical model
38. Ground water in the
zone of aeration is held by
(A) Capillary fringe
(B) Capillary force
(C) Gravity
(D) Van der Wall
39. Shannan-Weiner index
used as an indicator of
(A) Rare species diversity
(B) Common species diversity
(C) Species richness
(D) Species evenness
40. Assertion (A) :
Minerals are nonrenewable resource.
Reason (R) : Metals which are extracted
from minerals are renewable.
Identify the correct code :
Codes :
(A) Both (A) and (R) are true and (R)
is the correct explanation of (A)
(B) Both (A) and (R) are true, but (R)
is not correct explanation of (A)
(C) (A) is true, but (R) is false
(D) (A) is false, but (R) is true
41. Arsenic contamination
in ground water is most prevalent in
(A) Andhra Pradesh
(B) Haryana
(C) Maharashtra
(D) West Bengal
42. The gross primary
productivity is highest in the following ecosystem
(A) Deciduous forest
(B) Mangroves
(C) Coral reefs
(D) Grass lands
43. Match the List – I
and List – II
List – I List –II
a) Itai-Itai i) Fe
b) Minamata ii) Hg
c) Silicosis iii) Cd
d) Psiderosis iv) Si
Identify the correct codes :
Codes :
a b c d
(A) i ii iii iv
(B) ii iii iv i
(C) iii ii iv i
(D) iv iii ii i
44. The Red Data Book
published by IUCN provides
(A) Information of threatened species
of flora and fauna
(B) Information of wild life
(C) Information on toxic plants
(D) A book on biota of Red Sea
45. Recent approach for
the conservation of wild life is the establishment of
(A) Reserve forest
(B) National park
(C) Sanctuary
(D) Biosphere reserve
46. The largest national
park in India is
(A) Sunderbans
(B) Corbett National Park
(C) Desert National Park
(D) Nagarjuna Sagar National Park
47. The first recorded
bird that is now extinct
(A) Flemmingoes
(B) Great Indian Bustard
(C) Dodo of Mauritius
(D) California Condor
48. Afforestation in
non-forestry areas is called
(A) Integrated afforestation
(B) Social forestry
(C) Forest conservation
(D) Silviculture
49. Forests grown at the
height of about 3600 m represent
(A) Alpine
(B) Taiga
(C) Temperate
(D) Grass land
50. Salinity of soil is
measured by
(A) Porometer
(B) Potometer
(C) Conductivity meter
(D) Calorimeter