Mineral a is purple. mineral b is black. both minerals leave the same color streak. which following statement is true?

a) both minerals have the same true color
b) both minerals have identical physical properties
c) mineral a is made from different elements than mineral b
d) mineral b is a gem, but mineral a is a common mineral

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

it’s lava came from an explosive eruption

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.