What single characteristic does all life on earth have in common?
a- all organisms use the same process to produce lipids
b-all organisms transfers hereditary information through proteins
c-all organisms transfers hereditary information through dna
d- all organisms are able to specialize their cells

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Explain the process that creates the heat of the sun?