Which of the following do the atoms 14C and 14N have in common?
A) total number of protons and neutrons
B) number of electrons
C) number of neutrons
D) number of protons
Question 2
In the 19th century, Charles Darwin suggested that life may have originated
A) in shallow ponds on land
B) deep beneath the oceans
C) beneath the surface of the Earth
D) in the atmosphere
