Compare the costs and benefits of biomass energy with coal, another carbon-based resource.

both biomass and coal energies are inexpensive, but they release greenhouse gases.

both biomass and coal energies are expensive, but they do not release greenhouse gases.

both biomass and coal energies are nonrenewable, and they do not protect habitats.

both biomass and coal energies are renewable, and they protect habitats.

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.