Which best describes the process of insertion?
a. occurs when part of a chromosome breaks off and is inserted into the middle of another chromosome
b. occurs when part of a chromosome breaks off and reattaches backward on the same chromosome
c. occurs when part of a chromosome breaks off and does not reattach
d. occurs when part of a chromosome breaks off and attaches to another chromosome

Answer;

D. occurs when part of a chromosome breaks off and attaches to another chromosome

Explanation;

-An insertion (also called an insertion mutation) is the addition of one or more nucleotide base pairs into a DNA sequence.

-An insertion mutation is a permanent change in a DNA sequence caused by the addition of nucleotides. If the number of nucleotides inserted is a multiple of three, then it is a non-frameshift mutation.

The correct answer is option A. "occurs when part of a chromosome breaks off and is inserted into the middle of another chromosome".

Explanation:

Chromosome insertion refers to a mutation that occurs when part of a chromosome breaks off and is inserted into the middle of another chromosome. This dramatic changes involve the random insertion of large DNA fragments that most of the time carry one or more functional genes. Sometimes this mutation can cause the silencing of genes in the chromosome where the fragment was inserted due to disruption in its reading frame sequence.

answer by yourhope:

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human impact on the environment can be seen in the deterioration of the !

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4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."