Explanation:
Noble gases have a full outer energy level and are inactive. These atoms are considered inert.
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Answer:
Over our lifetime, our DNA can undergo changes or mutations that result in differences in the DNA sequence and may affect the proteins that are made. Mutations can occur as a natural consequence of errors in DNA replication or as a result of exposure to environmental factors such as smoking, sunlight or radiation.
Explanation:
Answer:
5 bases
Explanation:
If there are 17 amino acids and only 2 bases that can be combined in order to make a codon then:
for 4 bases 
is 16 and it is not enough combination for all 17 amino acids
for 5 bases 
is 25 combinations (meaning that more than one codon could code for the same amino acid).
The central communication conduit
between the brain and the rest of the body is the spinal cord. The spinal cord
is a long thin structure that comes from medulla oblongata in the brain stem to
the bottom of the spine. The spinal cord is made up of nerves that transmit messages
between the brain and the rest of the body.
