Answer to Question 1ANS: C
Desiccation is the drying out of an organism. Motile animals can move towards water, but sessile
organisms must await the return of water. They trap water within their shells to keep their gills moist.
Some have a protective mucous which prevents water loss. Information can be found in the section
Examples of Marine Communities.
Answer to Question 2ANS: C
The Arctic does not have a deep scattering layer. Perhaps this is due to the abundance of nutrients in
the deep water and the waters above. Information can be found in the section Examples of Marine
Communities.
The most abundant elements found in living organisms
Some organisms used as models in genetic research
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
(A) Dornier Compact Delta® lithotripsy system. Acoustic shock waves generated by the shock-wave-gene
A Wave Machine Generating Electricity off the Coast of Portugal
Dermatological changes with myxedema can occur behind the eyes or in the lower leg, as shown here.