An atom is the smallest complete part of a(n) that still has all the original properties of this substance.
a. crystal
b. nucleus
c. element
d. molecule

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

What is hydroelectric power produced by?