In the space below, write a description of the connection between molecules and traits and reproduction.

A molecule of DNA is made up of two strands which are joined by the hydrogen bonds present in the nucleotide bases. The sugar and phosphate  make up the backbone of the DNA. The sequence of the nucleotide bases determines the traits that an organism will carry.  Genes are hereditary molecules which are made up of sections of DNA. Together, they make up the entire genome for the organism. Each gene is located on a specific place inside the chromosomes. The chromosomes are the element of reproduction as they undergo the process of meiosis and duplicate themselves.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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