Marine Biology

2. a fibrous substance consisting of polysaccharides and forming the major constituent in the exoskeleton of arthropods and the cell walls of fungi.
4. Amount of salt in something
5. a self-replicating material that is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
6. global positioning system
12. the state of the atmosphere at a place and time
13. a landing stage or small pier at which boats can dock or be moored.
14. the regions of the surface, atmosphere, and hydrosphere of the earth
16. a long shallow often V-shaped receptacle for the drinking water or feed of domestic animals
21. a ring-shaped reef, island, or chain of islands formed of coral.
22. a place or period in which nothing happens or in which no life exists.
23. a position or role taken by a particular kind of organism within its community.
25. steep-sided valley cut into the seabed of the continental slope, sometimes extending well onto the continental shelf
26. basic building blocks of all living things.
27. the rigid outer part of the earth, consisting of the crust and upper mantle
28. a submicroscopic infectious agent that replicates only inside the living cells of an organism

1. any of a class of organic compounds that are fatty acids or their derivatives and are insoluble in water but soluble in organic solvents
3. all the waters on the earth's surface, such as lakes and seas
7. a scale used to specify the acidity or basicity of an aqueous solution
8. a microorganism which grows in the presence of air or requires oxygen for growth.
9. a point on a surface wave where the displacement of the medium is at a maximum
10. a wall or embankment erected to prevent the sea from encroaching on or eroding an area of land.
11. A nearly horizontal plateau on the beach face or backshore, formed by the deposition of beach material by wave action, or by means of a mechanical plant as part of a beach recharge scheme
15. an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus
17. a seamount with a flat top.
18. carbon dioxide and chlorofluorocarbons
19. the weather conditions prevailing in an area in general or over a long period
20. a submarine mountain.
24. the regions of the surface, atmosphere, and hydrosphere of the earth
25. large algae growing in the sea or on rocks below the high-water mark.