Question 21 1 pts
When a test tube of water containing an elodea (aquatic plant) is place near a white light, the
plant gives off gas bubbles. When elodea is placed near different color light, the rate of
bubbles is affected. The independent (manipulated) variable in this demonstration is the
o type of plant used
O color of light source
distance of plant from the light source
O temperature of the water in the test tube
1 pts
Question 22