Mutations are changes in the DNA of an organism. Changes caused by mutations can affect the structure and function of different
proteins in the body. Three changes caused by mutations are described below:
• Having two different-colored eyes is caused by a mutation that results in increased or decreased pigmentation in one of the
eyes. While this mutation affects the coloration of the eye, it does not affect how the eye functions.
• Cystic fibrosis is caused by the mutation of a protein in the lungs that causes a sticky mucus to build up in the lung tissue. This
build up of mucus can make it difficult for a person to breathe.
• Bone density can be affected by a mutation. This mutation can cause very dense bones that are almost unbreakable.
What is true about mutations in organism?
A. Changes caused by mutations always have negative effects on an organism.
B. Changes caused by mutations can be harmful, beneficial, or neutral to an organism.
C. Changes caused by mutations always have positive effects on an organism.
D. Changes caused by mutations never have an effect on an organism's cells.
?

The outcome of a mutation, or alteration in the DNA structure. Mutations can have a wide range of impacts, from being advantageous to having no effect to having fatal consequences, and everything in between.
The majority of mutations on the organism they occur in have neither good nor bad effects. Neutral mutations are the name given to these mutations.
Some mutations benefit the organism in which they take place. They are known as advantageous mutations. They result in novel protein variants that aid organisms in adjusting to environmental changes.
Any arbitrary alteration to a gene's DNA is likely to produce a protein that performs improperly or not at all. Such alterations are probably detrimental.

Therefore, option B. is correct.

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