Name the gas released from the marshy areas.
Oxygen
Nitrogen
Methane
Argon
The term endangered species is defined as:
a species in decline due to human activities.
a species not in immediate danger of extinction, but potentially becoming so.
a species in immediate danger of extinction.
a species with a low number of individuals.
Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.
Concentration
Biomagnification
Expansion
Pollution
Which of the following diseases is transmitted by mosquitoes?
Cholera
Typhoid
Cryptosporidiosis
Malaria
The presence of high coliform counts in water indicate:
contamination by human wastes.
phosphorus contamination.
decreased biological oxygen demand.
hydrocarbon contamination.
What are pollutants that interfere with the normal functioning of hormones called?
Radioisotopes
Synergists
Stimulants
Endocrine disruptors
