The writer should always refer (B) hypothesis
An autotroph is an organism that can make its own food.
"SCIENTIFIC" is the answer to this question,
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During the first one to two months of life, infants are incapable of deep sleep (they do not have trouble falling asleep but they do not generally stay asleep for very long stretches). This happens because infants can’t make the difference between night and day - they do not yet have a circadian rhythm. Around six weeks, the hormone melatonin is produced (pineal gland) and it helps establish a normal sleep-wake cycle.
The one that is not a piece of molecular evidence supporting the endosymbiotic theory is B) The mitochondria and chloroplasts are much different in structure in bacteria.
Hope this helps! :)