Answer:
Light energy or chemical energy
Explanation:
Light energy or chemical energy support the whole pyramid. Without it, plants/producers would die (they wouldn't be able to photosynthesize or chemo synthesize), leaving the first level consumers with no food, thus leaving the second level consumers with no food, and so on.
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Double fertilization occurs in Angiosperms
Option D is correct.
A synapse is the opening between neurons that neurotransmitters pass through.
Answer:
Eukaryota, Archaea, Bacteria
Explanation:
They are the largest taxonomic groups.