Photosynthesis provide food and oxygen to all the living organism Is this true or False ???

This question is only for applicants to scholars for medicine or scholars for dental medicine: what aspects about medicine (or dental medicine) intrigue you? describe how these aspects influence your life. (100-650 words)

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).