What molecule makes up majority of the cell membrane? why is this important?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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