Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
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The answer would be bone marrow
Answer:
The physical interaction of light with particles and gases in the atmosphere
Explanation:
The way visibilty works is that light bounces off objects and molecules which return to our eyes and give us the ability to see our surrondings and light in the atmosphere is scattered which at times prevents us from being able to see.