The proper functioning of our digestive system is due to the presence of our diet
Answer:
Around 4.1 billion years ago, the first single celled life form appeared on Earth
Answer:
I chose nucleus and the mitochondria
Explanation:
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell's DNA. Two other critical organelles are mitochondria and chloroplasts, which play important roles in energy conversion and are thought to have their evolutionary origins as simple single-celled organisms.
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<span> cellular respiration cannot occur without photosynthesis</span>