Researchers studying the effects of toxic wastes knew that animals were poisoned by the heavy metal cadmium, but they wanted to know where cadmium accumulated in the body. they could find out by

The accumulation of cadmium can be found out by tracing the movement of cadmium isotopes in the test animals.  

Nuclear medicine refers to the branch of a medical specialty, which utilizes radioactive tracers, that is, radiopharmaceuticals to evaluate the functions of the body and to treat and diagnose a condition. The specially developed cameras permit doctors to find the passage of these radioactive tracers.  

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)