Which forms of life on Earth show the greatest diversity?
A) insects
B) human beings
C) plants
D) microbes
Question 2
What kinds of atomic nuclei formed during the era of nucleosynthesis?
A) only hydrogen
B) only helium
C) hydrogen and helium and trace amounts of deuterium and lithium
D) roughly equal amounts of each of the following: hydrogen, helium, deuterium and lithium
E) nuclei of all the chemical elements