Just like land animals, marine fish breathe oxygen. they do so by directing a flow of ocean water over their gills. what can you conclude from this information? a. ocean water contains a large amount of dissolved oxygen gas
b. ocean water undergoes fission inside fish gills
c. fish excrete cellular waste through their gills

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.