List all the planets of our solar system from largest to smallest orbital radius?

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

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic.

According to these anatomical structures which two animals are probably most closely related