While waiting for a signal to contract, a muscle cell membrane maintains a slightly higher positive charge on the only because are available to generate this difference.

your spelling is a little off : ]

the correct answer is sex-linked recessive.

i just took the test

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.