Inner Core, Outer Core, Mantle, and Crust.
<span>The protocell's fatty acid membrane allows chemical compounds, including the building blocks of DNA, to enter into the cell without the assistance of the protein channels and pumps required by today's highly developed cell membranes</span>
Answer:
Serotonin is an important chemical and neurotransmitter in the human body. it is believed to help regulate mood and social behavior, appetite and digestion, sleep, and memory
ATP
Explanation:
ATP is produced in the cells and its conversion to energy is a single-step process.
Answer: could you be more specific what is your question
Explanation: