Cations are positive so they have less electrons than protons, while anions are negative so they have more electrons.
True, organisms take in nitrogen and carry out life processes.
The answer you are looking for is false
The more advance the community the more complex the speciess
Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain. Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources :)