Yes some fishes have long tails that can be a threat which can cause fights.
        
             
        
        
        
It stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include intermediary metabolism, growth, protein synthesis, and reproduction (cell division). The diverse functions of the ER are performed by distinct domains; consisting of tubules, sheets and the nuclear envelope.
        
             
        
        
        
Stars are balls of gasses while planets are gasses and rock 
        
             
        
        
        
Answer:
what you change vs what you are testing
Explanation:
The independent variable is the variable that you change. For example, if we were growing plants and wanted to see if more sun made them grow higher, you would change the amount of sun that each plant is exposed to.
The dependent variable is what you measure. This depends on the independent variable. So, in our plant experiment, the height of the plant is the dependent variable.
Control. The control is what stays the same. So in our plant experiment, the amount of water, type of plant, type of soil, and all of these things would stay the same to insure that the results are equal.
 You affect the independent variable and the control and you test the dependent variable.
 
        
             
        
        
        
Molecule, organelle, cell, tissue, organ, organ system, organism, community, population, ecosystem, biosphere