Humans, apes, cats, dogs, and more share a large, hollow chest cavity protected by ribs. these ribs serve similar functions in each animal to allow for breathing and to protect vital organs. ribs, as described here, are most likely examples of what type of structure?  

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.

To be or not to be that is da question