Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
Answer:
The Persians began a system of managing government that is called a <u>absolute monarchy </u>
Explanation:
The had a absolute monarchy government with a decentralized administration and local autonomy
Answer:
C. Cytology is the study of cells, while histology is the study of tissues.
Explanation:
