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*the earliest known life forms on ‘earth’ are putative ‘fossilized micro-organisms’ found in ‘hydro-thermal vent precipitates’*
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(the earliest time that ‘life forms’ first appeared on ‘earth’ is unknown)
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(they may have lived earlier than 3.77 billion years ago, possibly as early as 4.28 billion years ago, not long after the ‘oceans’ formed 4.41 billion years ago, and not long after the formation of the ‘earth’ 4.54 billion years ago)
(a ‘life form’, or ‘lifeform’, is an ‘entity’ or ‘being’ that is ‘living’)
(the first living things on ‘earth’ are thought to be ‘single cell prokaryotes’, perhaps evolved from ‘protobionts’ (‘organic molecules surrounded by a membrane-like structure’))
(the oldest ancient fossil microbe-like objects are dated to be 3.5 Ga (billion years old), approximately 1 billion years after the formation of the ‘earth’ itself)
(by ‘2.4 Ga’, the ratio of ‘stable isotopes’ of ‘carbon’, ‘iron’, and ‘sulfur’ shows the action of ‘living things’ on ‘inorganic minerals’ and ‘sediments’ and ‘molecular biomarkers’ indicate ‘photosynthesis’, demonstrating that ‘life’ on ‘earth’ was widespread by this ‘time’)
“eukaryote”
(‘cell’ with ‘nucleus’)
(on the other hand, the exact sequence of chemical events that led to the first ‘nucleic acids’ is not known)
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(several hypotheses about ‘early life’ have been proposed, most notably the ‘iron-sulfur world theory’ (‘metabolism’ without ‘genetics’) and the ‘RNA world hypothesis’ (‘RNA life-forms’))
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥