It is thought that life arose on earth around four billion years ago. The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes.
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Answer:
C they cannot reproduce on their own. -w-
Explanation:
The answer is A. <span>Energy taken from ATP and NADPH is used to make energy-rich carbohydrates.
The light-independent reactions are reactions in which ATP and NADPH is used for the conversion of carbon dioxide into </span><span>energy-rich carbohydrates. So, the carbohydrates are produced and not used up as stated in choice B. Carbon dioxide is neither broken off of molecules with three carbons nor were used up in the light-dependent reactions, leaving choices C. and D. as wrong ones.</span>
<span>Human activities can alter an ecosystem and bring about the extinction of a species. Such activities include any of these except assuring a habitat remains unaltered.
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