Land plants no longer required water as a medium for reproduction with the evolution 1 fruits and roots, 2 flowers and leaves, 3 cell walls and rhizoids, 4 lignified stems, 5 seeds and pollen

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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