The experiment must maintain internal and external validity, or the results will be useless. When designing an experiment, a researcher must follow all of the steps of the scientific method, from making sure that the hypothesis is valid and testable, to using controls and statistical tests
Answer:
19) Hydrophilic
20) Hydrophobic
Explanation:
as a side note, you can remember these because Hydro means water, and phobic indicates fear of. Philic indicates a like of.
The polar bears are going to fight for the different resources that will become limited in their environment