"Ch. 12 - Marine Life and the Marine Environment": HTML5 Crossword

Across

3. Passively drifting or weakly swimming organisms that are not independent of currents. Includes mostly microscopic algae, protozoa, and larval forms of higher animals. (8)
4. Pertaining to the property of an aqueous solution having a lower osmotic pressure (salinity) than another aqueous solution from which it is separated by a semipermeable membrane that will allow osmosis to occur. (9)
6. One of the three major domains of life. It consists of simple microscopic bacterialike creatures and other microscopic life-forms that prefer environments of extreme conditions of temperature and/or pressure. (7)
8. Light organically produced by a chemical reaction. Found in bacteria, phytoplankton, and various fishes (especially deep-sea fish). (15)
10. The _______ layer is a layer of marine organisms in the open ocean that scatter signals from an echo sounder. (14)
12. The total mass of a defined organism or group of organisms in a particular community or in the ocean as a whole. (7)
13. A layer that extends from the surface of the ocean to a depth where enough light exists to support photosynthesis, rarely deeper than 100 meters. (12)
15. The _______ environment (or zone) is the ecological region at the bottom of the ocean. (7)
16. Any loose material produced directly from rock disintegration, or material resulting from the disintegration of dead organic remains. (8)
18. A zone of low dissolved oxygen concentration that occurs at a depth of about 700 to 1000 m. (18)
19. The open ocean environment, which is divided into the neritic province (water depth 0 to 200 m) and the oceanic province (water depth greater than 200 m). (18)
20. Pelagic animals such as adult squids, fish, and mammals that are active swimmers to the extent that they can determine their position in the ocean by swimming. (6)

Down

1. Protective coloration in an animal or insect, characterized by darker coloring of areas exposed to light and lighter coloring of areas that are normally shaded. (14)
2. Algal plankton. One of the most important communities of primary producers in the ocean. (13)
5. Animals that live on the ocean bottom, either attached or moving freely over it. (8)
7. A marking or color pattern that confuses prey. (20)
9. A term that describes animals that are active primarily during twilight (dawn & dusk). (11)
11. The process by which water molecules move through a semipermeable membrane from higher water molecule concentration (lower salinity) to lower water molecule concentration (higher salinity). (7)
14. The _______ zone is the benthic environment between 4000 and 6000 m deep that remains in perpetual darkness and never receives daylight. (7)
17. Pertaining to the property of an aqueous solution having a higher osmotic pressure (salinity) than another aqueous solution from which it is separated by a semipermeable membrane that will allow osmosis to occur. (10)