I think its salinity because the other things have something to do with tracking precipitation
Answer:
where are the answer choices?
Explanation:
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Nitrogeneous bases
sugar
phosphate group
Answer:not 100%
Explanation:
What we’re the options for 5 and 9
1.Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills either on side of the pharynx.
2.Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries.
3.The colour is red
4. A Gill filaments project from each arc between the dorsal upper and ventral lower surfaces of the filaments.
