You are interested in studying a gene called cftr because mutations in this gene in humans cause cystic fibrosis. you have made a line of mice that lack the mouse cftr gene. these mice are unable to clear bacteria from their lungs, so they get lung disease. you put a normal human cftr gene into some of these mice and discover that the mice with the human gene are able to clear bacteria from their lungs and no longer get lung disease. from this experiment, you can conclude that:

d. sodium chloride ions.

italy's population growth rate is almost at zero, the national statistics agency, istat, said on monday, mainly due to a dwindling birth rate.

answer; 60-100; beats per minute

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this