Fear that emerges from a source that is difficult to identify or from a source that does not pose as much a threat as originally thought is

Which type of website is mostly to be biased when proving information about a product

Aperson who doesn't have enough calcium in his or her diet is at risk for developing bones that are weak and break easily. this condition is known as  a.  osteoporosis.    b.  crohn's disease.    c.  celiac disease.    d.  hemophilia.

When studying heredity, what is the relationship of dna based and traits? super urgent !