What is the end result of using the technique known as polymerase chain reaction (PCR) on a DNA fragment

chordata is the answer

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )