Author Question: The reverse of the respiration reaction is the reaction known as A) combustion. B) oxidation. ... (Read 114 times)

pragya sharda · **on:** Jul 29, 2018

The reverse of the respiration reaction is the reaction known as

A) combustion.
B) oxidation.
C) photo-synthesis.
D) inhaling.
E) exhaling.

Question 2

The carbon in a certain ancient ax-handle is only 1/8--one-eighth--as radioactive as the carbon in living wood. The half-life of 14C is 6000 years. From these facts we can conclude that

A) the ax-handle was made from an unusual type of wood that was less radioactive than normal wood.
B) the ax-handle is about 18,000 years old.
C) the natural carbon-radioactivity at the time the ax-handle was made was only one-eighth of what it is today.
D) the ax-handle is about 12,000 years old.
E) the ax-handle is about 48,000 years old.