Thermal stratification of aquatic ecosystems takes place in
The scale length of pressure variations in atmosphere in vertical direction is about
Which radioactive element is considered as an indoor pollutant ?
In a closed thermodynamic system, across its boundaries
Answer: transfer of heat and work is possible.
In an urban area, moist air at 27 C has a mixing ratio of 50 gm per kg. Its virtual temperature is
Under aerobic biodegradation of DDT, which of the following compound is formed ?
Among the following heavy metals, which has highest concentration in earth’s crust ?
Composition-wise halons are related to
Which of the following gases has highest absorption co-efficient for solubility in water ?
Quantity of glucose (MW 180) required to prepare 1000 ml of 5% solution is
Endemic species are
Answer: Restricted to a particular area
Which of the following is the in-situ biodiversity conservation site ?
Answer: Biosphere reserve
The largest unit of climax communities representing well defined climatic zone is referred to as
An active, adaptive control process which is able to maintain the overall balance is known as
Niche of an organism is