OCS 1005 : OCS FINAL EXAM Review
15 Mar 2019
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Final exam to include: chapter 15 marine animals, chapter 16 marine communities, chapter 17 marine resources, chapter 18 ocean and environment. Know all phyla (group worm ones together) Found in tidal pools to abyssal depths: fishes: Water is 1000 times denser than air 100 times more viscous (internal resistance to flow) Very small organisms have a difficult time of swimming. Swimmers still deal with drag (resistance to movement) Drag depends on viscosity, speed, shape and size. friction, swim bladders, gills, osmosis, defense, etc. Return to birthplace (2, 3 or 4 year intervals) Hunt in packs, fast, aggressive: amphibians, marine reptiles, marine birds. 270 species of birds, about 3% are seabirds. True seabirds avoid land unless breeding, get all their food from the sea, seek isolated areas during reproduction. Community many populations of organisms that interact at a particular location. Population a group of organisms of the same species occupying a specific area.
