An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter, is known as

An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter, is known as AUTOTROPH 

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

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