Answer:
One sample should have had no enzyme and acted as a control.
Bottom feeders are aquatic animals that feed on the bottom of a body of a water. Crayfish is the bottom feeder. It is not active swimmer, it feed on stationary or slow pray, so it does not have such a streamlined body necessary to reduce drag during swimming. Its mouth is located on the underside of their heads and that way mouth is closer to the bottom where their food is.
<span>
</span>
D... i took science last year
Its head water that the best anwers
C is the answer just did it
