Answer:
Independent Variable: Give one group the drug and dont give the other group the drug
Dependent Variable:The data of if the drug improves the rats memory(if their memory is better, the same, or made worse)
I believe the blank is "mass."
Answer:
We use them for the meat as food and the shells as decorative items
Explanation:
hope this helps
Mutualism since the clown fish and the anemone both benefit from each other.