Question

Which is correctly matched?
1. Arsenic poisoning- Black foot disease
2. Secondary Effluent treatment- Biological process
3. Pyrolysis- Solid soil waste disposal
4. Tubifex- Water pollution indicator
5. Biomagnification - Degradable pollutants

A. 1,2,3,5
B. 1,3,4,5
C. 2,3,4,5
D. 1,2,3,4
E. 1,2,4,5

Answer 1

Hint: There are various diseases caused by metals. Various methods are used nowadays to know the amount of pollution in the air, water etc. Disposal of waste has become a very advanced technique to protect the environment from pollution.

Complete answer:
Let’s match the right side to the left side and know the correct matched answers.
> Arsenic poisoning- black foot disease: Arsenic is a carcinogenic cancer-causing substance. It causes the blackening of the skin and abdominal tissues.

> Secondary Effluent treatment- Biological process: The secondary treatments include the use of microorganisms to decompose the organic matter in the effluent so this is a biological process involving living microorganisms.

> Pyrolysis- Solid soil waste disposal: It is a method of solid disposal in the soil when the soil is exposed to a very high temperature so that the waste can be converted into ashes.

> Tubifex- Water pollution indicator: Tubifex is a roundworm which is habitual of the polluted area that means their growth in the water will indicate the pollution in the water. So they work as water pollution indicators

> Biomagnification - Degradable pollutants: Biomagnification is the increase in the toxic substance concentration at the successive trophic levels. There is a chain in our ecology that one organism is eaten by the other. So the toxic material keeps on accumulating in the higher animals that become non-degradable. This phenomenon is called biomagnification. The substances like pesticides, when drawn in the water, are eaten up by the fishes and then which are eaten by the higher animals. This gets concentrated in their body. So this statement is incorrect.

Hence, the correct answer is option (D).

Note: Humans are at the top of the food chain in our ecological system. So the maximum accumulation of toxic substances will be in humans. So this becomes very important to learn the concept of biomagnifications which is proved to be fatal at higher organisms levels. It can cause heart, liver, brain failure etc.