Question

in pasteurs experiment, whether dust had access to the surface of the broth was the

control

hypothesis

experiment

variable

Explanation:

In Pasteur's experiment on spontaneous generation, the factor being manipulated (whether dust - carrying microbes can access the broth) is the variable. A control is a standard for comparison, a hypothesis is a proposed explanation, and an experiment is the procedure. The dust access is the independent variable here.

Answer:

D. Variable