All of the following statements apply to the Watson and Crick model of DNA excepl. A)The framework of the helix consists of repeating sugar-phosphate units.
B)The two strands of the DNA form a double helix.
C)The distance between the strands of the helix is uniform.
D)The purines are attracted to pyrimidines.
E)The two strands of the helix are held together by covalent bonds.

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

Me with biology endocrine system crossword also image left i need with hw

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from