Effect occurs when two drugs are taken together and the combined results is less the the effect of each drug taken separAtely

true

Explanation:

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metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

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