Nitrogen and phosphates end up in the water from; land, sewage water and

Planktons
Phytoplankton’s
Waste material
Glacial
Waste material  

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Toxaphene, terms as very harmful insecticide, affecting; the lungs, nervous system and
A. Causes abnormality
B. Causes death
C. Causes disruption of blood circulation
D. Causes vision issues
Bacteria is responsible in converting the ‘inert nitrogen’ gas into a;
A. Non usable form
B. Usable form
C. Non consumption form
D. chemical form
The impact of a chemical substance on an ecosystem, measured by a;
A. Chemical test
B. Toxicological Test
C. Lab tests
D. tube test
Lindane compound served as a pesticide in; agriculture and
A. Plants
B. Animals
C. Treatment of insects
D. treatment of lice infections
Zinc helps as a Cofactor in many enzymes, such as; carboxypeptidase and
A. carbonic anhydrase
B. ATPases
C. Hormones
D. Gastric lipase
In euphotic zone, the sunlight penetrates the water, proficiently used by;
A. Plants
B. Insects
C. Autotrophic organisms
D. sea creature
Asphalt’ and ‘bitumin’ consist of mixtures of large;
A. Polyaromatic hydrocarbons
B. Aromatic carbons
C. Parafines
D. Alkane

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