Choose two ecosystems, a marine and a terrestrial ecosystem. Create biomass and energy pyramids for each ecosystem. Then, study and compare each pyramid in terms of production efficiency and productivity. Focus on the following points when working on this activity.

The difference between the pyramids in each ecosystem.
The efficiency with which energy is transferred through all the trophic levels in the Energy and Biomass pyramids.
Explain how each level is a biomass to the next level in both pyramids.
Use the following keywords when researching: primary productivity, efficiency, production, biomass pyramids, and productivity pyramids.

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.