Long term and short term hair loss, weakness, tiredness. ☆
Answer:
the cell membrane (or plasma membrane)
I have never heard of the four phases of research, but I know that the scientific method can be summarized in four steps.
1. Observe something in nature.
2. Make a hypothesis (prediction) based on that observation.
3. Design and undergo and experiment to test the validity of your hypothesis.
4. Draw a conclusion about your hypothesis based on the results of your experiment.
I wpupd say D but im not sure
