This is true, Darwin spent over 20 years developing his theory of natural selection
Answer:
o increased osmotic pressure of plasma
Vegetarian is the best choice
The factor being tested is the variable. There are two types of variables, independent and dependent. The independent variable is the factor being changed by the scientist or the person controlling the experiment. The dependent variable is the thing that gets changed due to the changing of the independent variable. The dependent variable cannot be changed physically by the person doing the experiment.
