Ascientist wants to observe the structure that joins a cell to neighboring cells. how should the scientist observe the detailed structure of the cell

As a small change in a person's dna can cause a genetic disorder

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing