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.
Origins of replication in the chromosomes of different organisms
Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations
In most ecosystems, sunlight provides the ultimate source of energy to power all biological activity
Diverse living organisms share common chemical features
Animated! Organisms are classified into groups according to their characteristics
Reverse Genetics Approaches in Model Genetic Organisms