The correct option is A.
Both plants and animals have the carbon element in their body. When plants and animals die, their body organs become decay as the result of the activities of the decomposers. The activities of the decomposers releases the carbon in these dead organisms back into the soil.
Answer:
Homo erectus. it first spread through africa and eurasia.
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Explanation:
Answer: The correct option is C.
Cloning vectors.
Explanation:
Viruses are use as cloning vectors because they can give the new gene or birth the new gene by infecting the cell. They are so modified and orogrammed in such a way that they cannot cause disease when it is used in humans. Cloning vector is a DNA fragment gotten from viruses or bacteria plasmid which is maintained and used for cloning purposes.
Similarity: both burnings lead to energy production and both result in CO2 emission.
difference: food is burned in the process called cellular respiration. this process consists of a few certain stages preventing our body from heat shock.