1.     earth's tallest mountain ranges are formed at plate boundaries.                a.  subductingb.  oceanic-continentalc.  continental-continentald.  oceanic-oceanic 

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

During an investigation of an xss attack, the investigator comes across the term "[a-za-z0-9\%]+" in analyzed evidence details. what is the expression used for?