Explanation: we will conclude this by the following characteristics:
1.organims that lack a proper nucleus.
2.they have membrane bounded organelles
3.they are tiny single cell oraganisms which cannot be seen by naked eye.
4.they are the oldest livinh organisms on earth
5.they are present in very harsh conditions like volcanic vents or at the bottom of the sea
The term for this idea was "The Spontaneous Generation Theory."
The answer is A: Couple 3-4 in the 2nd generation produced children who do not show the trait. If it was a dominant trait, there would be a lot more children with said trait.