Electrodes work with a sort of "echo" process, where they emit a tiny electrical pulse then receive a responding pulse from the heart True or False?

a community that experiences major changes undergoes progress

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

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.