which term describes a precancerous skin growth that occurs on sun-damaged skin? a. vitiligo b. actinic keratosis c. squamous cell carcinoma d. comedo

The right option is b. actinic keratosis

An actinic keratosis describes a precancerous skin growth that occurs on sun-damaged skin. It is commonly found on the face, lips, ears, scalp and neck. The affected parts of the body appear rough, bumpy and scaly. A small percentage of actinic keratosis lesions can lead to skin cancer.

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explanation:

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'