Which of the following is an example of a producer?
a. oak tree.
b. big horn sheep.
c. california kingsnake.
d. box jellyfish

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