A Puzzle for Vegetarians

Are you a vegetarian who eats leavened bread? Yeast is an animal - so I presume that because yeast has no brain, no nervous system, and no means of feeling pain it's O.K.

Now, second phase of the puzzle: do/would you also eat/smoke hot-house/hydroponically grown plants so long as pesticides weren't used (bearing in mind that the chemical nutrients supplied in the water are artifically produced)?

If you said yes to both of the above, then would you eat ( this )

?

Why or why not?