define hetrodention and nucleus.
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Answer:
The nucleus is the information centre of the cell and is surrounded by a nuclear membrane in all eukaryotic... A cell normally contains only one nucleus.
Nucleus : The positively charged central region of an atom, composed of one or more protons and (for all atoms except hydrogen) one or more neutrons, containing most of the mass of the atom.
Heat retention : refers to the amount of heat an object or material can store overtime. If you have ever been to the beach during sunset, you have likely experienced heat retention in action.
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