4. Completa el texto con las siguientes frases del listado. ATMOSFÉRICO, COMBUSTIBLES FOSILES, LLUVIA ÁCIDA, ACIDIFICA EL AGUA, ECOSISTEMAS.

La contaminación por ? es una alteración ? que destruye la vegetación,
? y el suelo y afecta el ? , es el resultado de la quema de ? y gases industriales nocivos.

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.'

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

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;

can i have a list of the items?