B ecosystem. They include abiotic factors and biotic factors.
Answer:
option B
Explanation:
On a biological level, the main difference is that bacteria are free-living cells that can live inside or outside a body, while viruses are a non-living collection of molecules that need a host to survive.
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deoxyribose sugar in DNA and ribose sugar in RNA.
DNA contains THYMINE but RNA contains URACIL in place ot that and all other nitrogen bases are same.
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Answer: B - A battery with wires
Explanation: The mitochondria is the cells source of energy
