Plzz why have astronomers decided that pluto should be reclassified as a dwarf planet?

They agreed a new defination of the planets and created " dwarfs planets" a separate type of object. Pluto qualified only as a dwarf planet because it is not the dominant object in the neighborhood of it's orbit..

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

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: