CBSE Class 11/12 - Biology - Environmental Biology (MCQs for AIPMT/NEET)

Environmental Biology 

(MCQs for AIPMT/NEET)

Q1: Green-house effect is warming due to

a) infra-red rays reaching the earth
b) moisture layer in atmosphere
c) increase in temperature due to increase in carbon dioxide concentration of atmosphere
d) ozone layer of atmosphere


Q2: The relation between algae and fungi in a lichen is 

a) symbiosis
b) parasitism
c) commensalism
d) protocooperation


Q3: Major aerosol pollutant in jet plane emission is

a) Sulphur dioxide
b) carbon monoxide
c) methane
d) chlorofluoro-carbons




Q4: Gas released in Bhopal gas tragedy was

a) methyl isocyanate
b) potassium isothiocyanate
c) sodium isothiocyanate
d) ethyl isothiocyanate


Q5: Fish die in water bodies polluted by sewage due to 

a) pathogens
b) clogging of gills by silt
c) reduction in oxygen
d) fuel smell

Temperature affects the rates of enzymatic reactions and as a result, the rates of DNA replication, cell division, and other key processes in cells are affected by rising temperatures.

Q6: Most hazardous metal pollutant of automobile exhausts is

a) mercury
b) cadmium
c) lead
d) copper


Q7: Drawback of DDT as pesticide is 

a) it becomes ineffective after some time
b) it is less effective than others
c) it is not easily/ rapidly degraded in nature
d) its high cost


Q8: Sunken stomata is a characteristic feature of 

a) hydrophyte
b) mesophyte
c) xerophyte
d) halophyte


Q9: Desert plants are generally 

a) viviparous
b) succulent
c) herbaceous
d) heterophyllus


Q.10 Which one of the following organism is used as indicator of water quality

a) Beggiatoa
b) Chlorella
c) Azospirillum
d) Escherichia



ANSWERS
1. c) increase in temperature due to increase in carbon dioxide concentration of atmosphere
2. a) symbiosis
3. d) chlorofluoro-carbons
4. a) methyl isocyanate
5. c) reduction in oxygen
6. c) lead
7. c) it is not easily/ rapidly degraded in nature
8. c) xerophyte
9. b) succulent
10. d) Escherichia