What is the importance of photosynthesis?

The instructions for making proteins come originally from

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

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