Figure 2.2 -Refer to Figure 2.2 (First Three Rows of the Periodic

Multiple Choice

Figure 2.2
-Refer to Figure 2.2 (first three rows of the periodic table) .If life arose on a planet where carbon is absent,which element might fill the role of carbon in compounds essential to life?

A) boron
B) silicon
C) nitrogen
D) aluminum
E) phosphorus