Answer :
Final answer:
Algae are plant-like organisms that utilize photosynthesis for energy production and are essential in the Earth's carbon cycle.
Explanation:
Algae are plant-like organisms that can be either unicellular or multicellular and derive energy via photosynthesis. They are photosynthetic organisms that play a critical role in the Earth's carbon cycle by converting carbon dioxide into oxygen. Algae are also of interest as a source of biofuel due to their high growth rates and ability to produce lipids for biofuel production.
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