Why are ostia important to sponges

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?