Imprinting and specific bird songs are examples of what kind of behavior

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Nerve cells are specialized to respond to stimulitrue or false?

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