The process of mucociliary streaming involves the removal of particles and pollen by the constant streaming of mucous propelled from the bronchial and tracheal passages by the cilia beating at over 1300 times per minute.
True/False

True

Explanation:

Whenever a person breathes air, some particulate material gets deposited in respiratory tracts. There is a certain limit on the size and the density of the particles beyond which particles need to be removed from the tract. The size of the particles deposited ranges between 1 to 2 microns. The particles deposited above alveoli with in the respiratory tracts are removed by moving mucus layer into the gastro -intestinal tract. This movement of mucus is assisted by ciliary structures and hence it is called ciliary streaming  

And the rate of cilia beating ranges between 1000 -1500 per minute

hence, the given statement is true

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion