Describe the investigation from the readings that is being done to create new hearts from the cells of rat hearts. Why do the researchers think that data from the investigation could help improve human health? Cite facts from the texts in your response.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

the answer is :

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves