Answer:
A
variations in the population
<span>The biological term for such organisms is "deuterostomes". Those who's first opening is the mouth are called protostomes.
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Answer:
Explanation: DNA is the information molecule. It stores instructions for making other large molecules, called proteins. and the function of DNA is To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.
Continental polar air mass this is the type of mass that come from northern Canada
