A molecular biologist is attempting to perform a Southern blot. After running the gel electrophoresis and blotting with paper, he attempts to visualize the fragment bands with an ultraviolet light, but no single band is fluorescing. Which of the following is the best explanation of why the experiment didn't work?

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

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)