Compare and contrast two of the three phytoplankton discussed at length in this chapter (Diatoms, Dinoflagellates, and Coccolithophores)
· Diatoms are one of the most abundant and productive phytoplankton in the ocean. They have a glass-like frustule body structure which is made up of closely fit valves. They contain yellow and brown accessory pigments.
· Dinoflagellates are single-celled autotrophs with normally two whip-like flagella. There are some species that live within tissues of other organisms. These phytoplankton are the main cause for red tides and harmful algae blooms. Some can transform chemical energy they use into light energy. This is called bioluminescence.
· Coccolithophores are autotrophs that have calcium carbonate disks covering their body. They thrive at the surface in brightly lighted areas. These are responsible for seabed oozes which can uplift like the White Cliffs of Dover
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Only about 2.5% of all the water on our planet is freshwater, however, ________
A) most of this is in underground aquifers B) over half of this is extremely hard water and is nearly unusable for drinking or agriculture C) over half of this is in wetlands near coastlines and is becoming contaminated with saltwater D) most of this is in polar ice caps, glaciers, and underground aquifers and is not easily accessed for human use E) most of this is in large, freshwater lakes
Divergence of air aloft in an air column means increasing pressure below it
Indicate whether the statement is true or false
In premodern societies, which group of people accounted for the bulk of consumption?
A) the large number of peasants B) the military C) the relatively few elites D) religious entities E) There was no consumption as we know it in the economic sense in premodern societies.
________ is a prime example of an integrated network of urban green spaces, woodlands, waterways, public spaces, and transportation corridors
A) Central Park, NY B) Los Angeles Riverway, CA C) Yellowstone NP, WY D) Boston Harbor, MA E) San Antonio Riverway, TX