I believe It is called an ice age
<span>The coding DNA strand and the RNA transcript are identical, except that thymidine nucleotides in the DNA are uridine nucleotides in corresponding sites of the mRNA transcript.
The coding DNA strand and the RNA transcript are parallel to each other.</span>
Classification systems are systems with a distribution of classes created according to common relations or affinities
The respiratory system, as indicated in its name carries out the processes of respiration.
The processes of the transport of the respiratory gases are carried out by the circulatory system, a network of arteries, veins and capillaries, and NOT by the respiratory system (the lungs).