DNA is a double-stranded, helical molecule composed of nucleotides, each of which contains a phosphate group, a sugar molecule, and a nitrogenous base. ... As the DNA polymerase moves down the single-stranded DNA, it uses the sequence of nucleotides in that strand as a template for replication.
The statement given in the question is TRUE; the health status of the American population is poor in international comparison.
America is one of the richest country in the world, but it is not among the healthiest. Despite the increase in life expectancy in past decades, Americans still live shorter lives and experience more injuries and illnesses compare to other countries of the world.
The major health conditions in which the American fare badly compare to other wealthy countries of the world include: infant mortality, injuries and homicides, HIV and AIDS, drugs related mortality, obesity and diabetes, hearth diseases, sexually transmitted diseases, teenage pregnancy, chronic lung diseases and disability.
Answer: Bones cells secrete an extracellular matrix that when combined with minerals becomes rock hard.
Explanation:
Neurons, act as the communicators of the nervous system. Neurons receive information, integrate it, and pass it along. They communicate with one another, with cells in the sensory organs, and with muscles and glands.
Information was taken from: http://www.sparknotes.com/psychology/psych101/thebrain/section2/
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C.interaction and attachment between myosin