Lead.
"Due to insufficient water treatment, lead leached from water pipes into the drinking water, exposing over 100,000 residents to elevated lead levels."
Answer:
The half-life of a substance is the amount of time it takes for half of that substance to decay. However, after two half-lives, half of the half remaining will decay, leaving you with one quarter of the original substance.
So, after 1 million years you will have 50% of the original substance remaining.
And, after 2 million years you will have 25% of the original substance remaining.
After 3 million years you will have 12.5% of the original substance remaining.
And after 4 million years you will have 6.25% of the original substance remaining.
Explanation:
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Answer:
Algal blooms can reduce the ability of fish and other aquatic life to find food and can cause entire populations to leave an area or even die. ... Nutrient pollution fuels the growth of harmful algal blooms which have negative impacts on aquatic ecosystems.
Explanation:
Answer:
these statements are true
B) Insertions or deletions of single base-pairs within a protein coding sequence probably change the amino acid sequence
D) Missense mutations always change the amino acid sequence encoded by a gene
E) Nucleotide substitutions outside of the coding sequence can affect the expression of a gene.
Explanation:
B) insertion or deletion of nucleotide in coding region of DNA can change the amino acid sequence encoded.
D) missense mutation means that the change in nucleotide sequence resulting in change in amino acid sequence encoded by gene.
E) A mutation may alter the promoter of a gene, thereby affecting the rate of transcription.
Answer:
where is the statement to answer the question
