Polychaeta generally refers to a class of annelid worms with segmented body parts.
Even though all of the answers are annelid worms, polychaetes are generally marine animals, so I would say that the answer is most likely Clam Worms.
Answer:
Pls attach an image so I can do it, then I can answer
Explanation:
Water is less dense as a solid than as a liquid. Normally this is reversed. Water has its maximum density at 4 degrees Celcius.
The fact that ice is less dense than water allows it to float on top of ponds so fish, frogs, etc can survive winters.
Answer:
-use PCR to amplify the gene for GFP
-perform a restriction digestion of the GFP gene and the plasmid
-ligate together the GFP gene and the plasmid to generate a recombinant plasmid
-transform bacteria with the recombinant plasmid using electroporation
-plate the bacterial cells, and screen for positive transformants
