Domesticated Micro-Organism

Saf Instant Yeast, 1-Pound Pouches (Pack of 4)
Saf Instant Yeast
A domesticated
      Micro-organism
Something that is pure bred
      And has symbolism
It leavens up our bread
      No exclusivism
Helps us to be well fed
      And negates cultism

So let's take up the thread
      Of our egotism
As yeast does leaven bread
      It lends criticism
To those who are misled
      By favoritism
'Cause the whole loaf of bread
      Feels that mechanism

Bob's Red Mill Active Dry Yeast, 8-Ounce Packages (Pack of 8)
Bob's Red Mill Active Dry Yeast
There's prejudice widespread
      Even jingoism
We are all loaves of bread
      With one organism
And unity instead
      Of exclusivism
And so my case is pled
      For ecumenism