The nucleus because it is the brain of the cell, it's what controls it.
An example of a parallel choice on a dichotomous key is happy or sad and old or young. Either one of those answers.
Answer:
The Endangered Species Act Of 1973
Explanation:
Answer:
Is it not weeds.................
Is this a multiple choice question or...??
If not, I'd say, that its simple as scientists can easily decipher which variable caused the situations result. And thats because you may have one manipulated variable to be able to know the responding variable.
