[Casiopea]

Here're some of my picks--all the same as tdol's picks. :D

1. "Now it has" (B) doesn't work because it needs a verb: "Now it has been."

2. "it is possible" (A) doesn't work because it would result in two verbs:
made it is possible the great strides in life sciences.

3. "can combined" doesn't work because 'combined' ends in -ed. Take off the -d, like this, 'can combine' (i.e. can do, could do).

6- "chemical" is an adjective, "chemicals" is a noun. "aircraft" can be an adjective or a noun.

9-Mitosis is the normal process by a means in which ....

All the best,