What is the mutation caused by the addition of a nucleotide to an already existing gene sequence called?

Insertion

Explanation:

Insertion is where one or more nucleotides are added to a DNA sequence.

Insertions can be hazardous if they occur in the exonic (amino acid coding) regions of the genome.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.