Most of the brain's excitatory ionotropic synapses use the neurotransmitter glutamate.
The best correct answer is C.
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<span>This variation be justified by:
</span>Migration to an environment different from their birthplace, and adaptation to the available food, ultimately leading to speciation. because <span>birds use their beaks to eat.</span>.
The answer to your question is <span>chemical energy
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Answer:I don’t know this one.
Explanation:but it should be a