Use of Synthetic Fertilisers Often Leads to the Contamination of Groundwater

question 19

Multiple Choice

Use of synthetic fertilisers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution?

• A) growing improved crop plants that have nitrogen-fixing enzymes
• B) adding nitrifying bacteria to the soil
• C) adding denitrifying bacteria to the soil
• D) using ammonia instead of nitrate as a fertiliser

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Definitions:

Acetylcholine

A neurotransmitter involved in many functions including muscle movement and memory, acting as a chemical messenger in the nervous system.

CNS

The central nervous system, comprising the brain and spinal cord, which functions as the primary control center for processing and responding to neural information.

Neurotransmitter

A neurotransmitter is a chemical substance that transmits signals across a synapse from one neuron to another neuron or to an effector cell (like a muscle or gland).

Synthesized

Synthesized involves creating a compound or material from simpler substances through chemical or biological processes.