Answer: The speaker admires and appreciates the librarian. She remembers the librarian's friendliness and how much effort she would make to provide the speaker with the books she wanted. These books were very meaningful and important to the speaker.
Explanation: Because i did the question on edgenuity
The correct answer is by using the antagonist.
The antagonist is a molecule that blocks a biological response by binding to the receptor. So, you add antagonists to the receptors you want to determine and see which antagonist blocked the response. By blocking the specific response you can get the answer what receptor it was.
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Answer:
The smallest unit of matter is an atom.
Explanation:
It is an atom because an atom is the smallest thing, that has weight and takes up space.