Answer:
All of them affect the DNA
Explanation:
Chemicals are compounds that can pass through cell membranes and modificate the DNA, elevated temperatures can denaturalize the cell and therefore damage the DNA, ionizing radiation can pass through cell organelles and reach the nucleus affecting the DNA, and viruses inject its DNA into the genome and modify it.
It's a mixture of H2O + a soluble substance like, salt.
D. layer B is younger than layer G.
The Curies discovered radium
The Rand water gets its raw water from canal connected with Vaal Dam and also from Vaal River Barrage Reservoir.
Explanation
Rand water is a purified water supplier system which supplies drinking water in South Africa.
It also provides purified water in industries and helps in sanitization of waste water.
The Rand water gets their source from waters in spruits or streams and then they purify it and supply to country like Gauteng province, Johannesburg and other parts of African continent.
It gets source water from canal connected with Vaal Dam and also from Vaal river barrage reservoir.
It is then purified by removing the suspended impurities and disinfecting the water and then supplied by pipelines to each homes.
