1. B: AA or aa (homo means "the same," these are identical traits.)
2. B (hetero means "different", and these are different types of traits."
I would say that the answer is D.
Lubricants, Magnetic Levitation, Ball Bearing
It is "B. Cleaning a countertop with a sponge and
<span> rinsing it out to reuse" that represents and example of conservation. Re-using items is better than throwing them away if possible. </span>
