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3 years ago

What ppb refer to regarding water testing

Biology

2 answers:

wariber [46]3 years ago

6 0

Answer:

On January 22, 2001, EPA adopted a new standard for arsenic in drinking water of 0.01 mg/l or 10 parts per billion (ppb), replacing the old standard of 50 ppb. Water systems had to meet the new standard by January 23, 2006.

Explanation:

Sunny_sXe [5.5K]3 years ago

5 0

Answer:

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water.

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Mutagens are useful in biotechnology research for producing organisms with altered phenotypes. producing new organisms which hav

ICE Princess25 [194]

Answer:

The correct answer is A.

Explanation:

A mutagen changes the level of mutations that occur in the DNA either by affecting it physically or chemically. This helps researchers create different organisms with altered phenotypes according to what the research needs so that the genes can be investigated further under a controlled environment.

So the answer is A.

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3 years ago

What is an effect of genetic drift on a gene pool?

Ahat [919]

Genetic drift happens by chance and can make an allele disappear completely from a gene pool, even if it was a desirable trait that should have been passed down to offspring. The random sampling style of genetic drift shrinks the gene pool and therefore alters the frequency the alleles are found in the population.

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3 years ago

When a bacterium damages humans belong cells and causes tuberculosis the human cells that affected in the lungs are?

AysviL [449]

being killed of leaving causing severe damage and leaving the lungs and the immune system of the human body affected by TB weak and defenseless without antibodies and medicine. the healthy cells are basically being killed by the TB bacterium.

3 0

3 years ago

Read 2 more answers

Name the carbohydrate which forms cell wall

Charra [1.4K]

Answer:

Cellulose

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5 0

2 years ago

Which approach to ecological investigations is illustrated by Biosphere 2? Defend your classification.

valentina_108 [34]

Answer:

The correct answer is : Biosphere 2 is a model based on the creation of a miniature ecosystem with life support systems.

Explanation:

Biosphere 2 is a small model of the biosphere, which is planned by scientists and engineers, that is closed and isolated from the outside world. In this study or research, the strategy for modeling is utilized to show the performance and conduct or behavior of a real biosphere.

Researchers made a model or an artificial situation that can uphold living things. It has a scaled-down model of a tropical forest, a grassland, a sea with a coral reef, a desert, and a mangrove biosphere. In these conditions, a wide range of animal varieties was contained. Furthermore, a group of eight individuals additionally fixed themselves inside it.

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3 years ago