Describe the composition of comets, where they originate and how they orbit the sun

Comets are cosmic object of frozen gases.

Explanation:

Comets are frozen bodies in the space which releases dust particles. Comets are formed of  icy particles, carbon dioxide, ammonia, methane etc. Comets have a solid nucleus, which contains mostly ice and dirt. A comet consists of a coma and a tail. There have a  trail of debris behind the comets  that can lead to meteor showers on the earth. Comets orbit the sun on a highly elliptical path. They can orbit the sun for hundreds and thousands of years.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

telophase and anaphase