Which describes a constant in an experiment?
a. the variable changed by the experimenter
b. the quantity that must remain the same
d. the variable that changes in response to the experiment
d. the statement that is worded to test the experiment

wheres the answers ?

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)