The one becomes a chicken, the other an addled egg.

Moreover, the application of different degrees of heat to different germs produces the most various reactions.
The germs of trout are speedily killed by the moderate temperature of 65 deg.

Fahrenheit, while the germs of most animalculae and plants develop rapidly at that temperature.

Such instances might be multiplied, but these are sufficient to contradict the rash assertion of sameness, because a hasty observer did not take pains to discover differences.
3.

There are four distinct plans of structure in the animal kingdom, and at least three, perhaps more, in the vegetable kingdom; and every germ, from the first instant when its evolution can be seen at all, is seen to develop only according to its own proper method.