1. dependent: mice’s weight. independent: amount of amino acid
2. dependent: plant’s height. independent: color of lights
3. dependent: amount of ammonia released.
independent: type of fish food
4. dependent: plant height. independent: temperature of water
5. dependent: tadpole’s development
independent: protein supplement or not
This question is impossible for us to answer because we don't have the parallelogram to see.
Some problems with direct democracy can be:
Sometimes the people are foolish and easily manipulated. Also representatives can also be foolish and easily manipulated.
Money applied in the right places can influence uninformed voters. But the same applies to representatives.
The people may not understand complex issues and may fall for simplistic solutions.