You are examining an organism recently found on Mars and are currently trying to identify one of its neurotransmitters. Biochemical characterization indicates that it is a derivative of the amino acid tyrosine, so you classify the novel neurotransmitter as a(n)

Abody cell has been growing and at synthesis proteins.in the nucleus of this body cell,dna replication is taking place. and a copy of the cells genetic material is copied.which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis.and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving

The smallest parts of these that retain their original properties are called

What are the two functions of the respiratory system