Temperatures in ponds and lakes vary by season.
Which of the following phrases describes a typical river mouth?a.clearer water with high levels of oxygenb.decreased vegetation and lower oxygen levelsc.increased species diversityd.high levels of vegetation
Saltwater fish constantly drink water but still excrete concentrated urine to compensate for the water loss. They also have gills to help excrete excess salts. Conversely, freshwater fish absorb salt from their surroundings using their gills and their bodies reabsorb salt from their urine. This describes how salt- and freshwater fish _______.a.use their gills to drinkb.keep the salinity levels even in their aquatic environmentsc.have adapted to deal with osmosisd.have evolved behavior patterns to match their physiology
Understanding the salinity of aquatic environments is unimportant in understanding the overall ecosystem.
Which of the following is not an example of a wetland?a.estuaryb.bogc.swampd.marsh
Which of the following did not allow researchers to further explore below the ocean’s surface?a.ROV’sb.Alvinc.Palomaresd.Bathysphere
An estuary is _______.a.a freshwater biomeb.an area with a low concentration of minerals and nutrientsc.characterized by deep waterd.an ecotone
Limnetic, profundal, littoral, and benthic have what in common?a.They refer to the upper-level zones found in salt- and freshwater ecosystems.b.They are all zones found in freshwater systems.c.They refer to the lower-level zones found in salt- and freshwater ecosystems.d.They are all zones found in saltwater systems.
What discovery was made by Alvin?a.over 4000 new species of marine lifeb.hydrothermal ventsc.the Aqualungd.the temperature of different parts of the ocean
Organisms that live in freshwater and marine biomes have developed unique adaptations that aid in their survival. Which of the following adaptations would be more useful for an animal in a marine biome than for an animal in a freshwater biome? a. flippers and flattened tails b. smooth, nearly furless body c. streamlined body d. tolerance to high levels of salinity Please select the best answer from the choices provided
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