Which of the following would not be true of cdna produced using human brain tissue as the starting material? a. it was produced from mrna using reverse transcriptase. b. it could be used to create a complete genomic library. c. it could be amplified by the polymerase chain reaction. d. it could be used as a probe to detect genes expressed in the brain. e. it lacks the introns of the human genes.

the correct answer is B. it could be used to create a complete genomic library.

your spelling is a little off : ]

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.