In molecular biology, the term double helix refers to the structure formed by double-stranded molecules of nucleic acids such as DNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure.
Calcium deficiency disease (hypocalcemia) --- like osteoporosis, osteopenia !!
Answer:
1. Ask him If he is a blood related twin.
2. Ask him where his twin was this whole time
3. Tell him he should ask himself if he done anything good to help the twin yet
Explanation: