Free MCQs & Online Quiz Practice for Exams

Q: Ozone layer is present in the: (2011 ETEA)

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Atmosphere

Q: C.F.C gases are produced from: (2011 ETEA)

A) Burning of coal

B) Burning of charcoal

C) Automobile engines

D) Refrigeration and air condition

Q: The area where ultraviolet radiation is intense is the: (2011 ETEA)

A) Alpine forests

B) Boreal forests

C) Arctic tundra

D) Alpine tundra

Q: A bacterium that converts NO2 to NO3 is: (2012 ETEA)

A) Rhizobium

B) Bacillus

C) Nitrosomonas

D) Nitrobacter

Q: Which one is not responsible for the formation of acid rain? (2012 ETEA)

A) CO2

B) SO2

C) CO

D) NO2

Q: Rain water becomes acidic, when the pH-value of rain water becomes: (2013 ETEA)

A) Greater than 6

B) Greater than 6.5

C) Less than 5.6

D) Less than 5

Q: Ozone gas is: (2013 ETEA)

A) Greenish, tasteless and light

B) Greenish blue, bitter in taste

C) Blue, poisonous and explosive

D) Purple yellow, nonpoisonous and explosive

Q: 'ARABLE' means: (2014 ETEA)

A) Not grown since long

B) Recently ploughed field

C) Watered the night before

D) Fit for cultivation

Q: Identify the mismatch pair in the following: (2017 ETEA)

A) Cyanobacteria-primary producer

B) Grasshopper-primary consumer

C) Fungi-decomposer

D) Zooplankton-secondary consumer

Q: The first stage in development of xerosere is appearance of: (2018 ETEA)

A) Foliose lichens

B) Crustose lichens

C) Fruticose lichens

D) Climax stage

Q: Each organism has a definite functional position different from either organism locally is called: (2008 ETEA)

A) Community

B) Niche

C) Habitat

D) Specious

Q: A study of communities in relation to environment is called: (2014 ETEA)

A) Social ecology

B) Synecology

C) Auto ecology

D) Heteroecology

Q: In nitrogen fixing bacteria, the nitrogenase complex is sensitive to: (2018 ETEA)

A) O2

B) CO2

C) NO2

D) NO3

Q: In the human body all the given organs are vestigial except: (2005 ETEA)

A) Appendix

B) Leg muscles

C) Coccyx

D) Nictitating membrane

Q: The total of all alleles in a population is called: (2006 ETEA)

A) Genetic drift

B) Genotype

C) Gene pool

D) Gene mutation

Q: Wings of a bird and fore limbs of a man are: (2008 ETEA)

A) Homologous

B) Analogous

C) Acquired

D) Vestigial

Q: The modern horse is called: (2008 ETEA)

A) Equus

B) Eophippus

C) Mesohippus

D) Mercyhippus

Q: Changes in gene frequencies in small population by chance is called: (2009 & 2013 ETEA)

A) Gene pool

B) Genetic drift

C) Gene mutation

D) Gene flow

Q: An inherited characteristic that increases an organism's ability to survive and reproduce in its specific environment is called: (2011 ETEA)

A) Radiation

B) Adaptation

C) Vestigial organ

D) Speciation

Q: A bird's wings are homologous to: (2011 ETEA)

A) Fishes tail fin

B) Dog's front legs

C) Mosquito's wings

D) Alligator's claws