How can carbon dioxide be considered a pollutant when it is a natural component of air?
a carbon dioxide is considered a pollutant even though it is a natural component of air, because it is
harmful to all living organisms.
b carbon dioxide is considered a pollutant when larger concentrations than normal are present in the
air as a result of human activity
c carbon dioxide is considered a pollutant because it foms harmful chemicals when mixed with
other pollutants in the air.
d carbon dioxide cannot be considered a pollutant under any circumstances.

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 have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. b. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. c. prokaryotic poly-a tails have other functions, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails.

What prevents odyssey from killing the sleeping cyclops

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.