Two identical twins live in the same city; one smokes and one doesn’t. The one who smokes develops lung cancer. What is the best reason for this? A.
mostly genetics factors

B.
genetics and environmental factors

C.
mostly environmental factors

D.
it was not related to their genetics or environment

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:

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this