How does the space suit backpack help astronauts breathe in a space environment? F It maintains air pressure to keep bodily fluids from boiling. G It provides pure O2 for inhaling and canisters to collect CO2. H It stabilizes and internal temperature of 22 ◦ C (72 ◦F). J It collects urine and solid wastes.

Which statements are true of a scientific theory but not a hypothesis

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

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.