Answer:
A) the diameter of the helix
Explanation:
This is was measured during the 3D structure of DNA proposed by James Waston and Francis Crick in 1953. The x-ray diffraction showed crossed shape of the X-ray films.The DNA appeared as two double strands structure.
The diameter of the DNA double helix is 20 Armstrong.
This diameter is constant because of the complementary pairing of bases.( purines with pyrimidines)
The correct answer is D: Schleiden and Schwann
A. RbOH is a base because its pH is greater than 7.
This statement is correct and points at the compound being a base because an Alkali always has a pH between 7 and 14. Starting from 7 which is a neutral compound neither acidic nor alkaline, the higher the pH value, the stronger the compound is an alkali or a base. The strongest pH compounds are those that have the pH value of 14 and the weakest alkalis are those the pH value of which is closer to 7.
None of the other options fit this criteria.
- It can help prevent muscle injuries and muscle soreness
- Look better
- Muscle strength helps prevent some health problems
- strengthens bones
- keeps the heart and other parts of the body healthy
on Earth biodiversity generally increases from the poles to equator
