Answer: Its velocity was 20 km/s southward.
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Answer:
D. decreased supply of energy
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Answer: prokaryotes (single celled micro-organisms/microbes)
Explanation: The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.
The correct answer i think is antibodies
