Answer:
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Explanation:
A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
Answer:
The anus is an opening at the far-end of the digestive tract and is the exit point for the waste material.
Explanation:
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Answer:
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.
Explanation: