The two gases making highest relative contribution to the green house gases are
CO2 and CH4
CH4 and NO2
CFCs and N2O
CFCs and N2O
A.
CO2 and CH4
The greenhouse effect is a naturally occurring phenomenon that is responsible for heating of earth's surface and atmosphere. Clouds and gases reflect about one-fourth of the incoming solar radiation and absorb some of it but almost half of incoming solar radiation falls on earth's surface heating it , while a small proportion is reflected back. Earth's surface reemits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases (eg CO2, CH4 etc) absorb a major fraction of it. The molecules of these gases radiate heat energy and a major part of which again comes to earth's surface thus heating it up once again CO2 (60%) and CH4 (20%) are commonly known as greenhouse gases because t hey are responsible for the greenhouse effect, that ultimately leads to global warming.
Which two of the following changes (1-4) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?
1) Increase in red blood cell size
2) Increase in red blood cell production
3) Increase in breathing rate
4) Increase in thrombocytes count
Changes occurring are
(2) and (3)
(3) and (4)
(1) and (4)
(1) and (4)
dB is a standard abbreviation used for the quantitative expression of
the density of bacteria in a medium
a particular pollutant
the dominant Bacillus in a culture
the dominant Bacillus in a culture
A renewable exhaustible natural resource is
coal
petroleum
minerals
minerals
Which one of the following is not used in organic farming?
Glomus
Earthworm
Oscillatoria
Oscillatoria
