The biological pump ________.
A. feeds most life in the ocean
B. helps regulate atmospheric CO2 concentrations, depends on photosynthesis, and feeds most life in the ocean
C. helps regulate atmospheric CO2 concentrations
D. refers to organisms that filter the water for food
E. depends on photosynthesis
Answer: B
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Which of the below statements accurately describes the components of an atom?
a. Protons, which have a positive charge, and neutrons, which have a negative charge, occupy the nucleus. Electrons with no charge orbit the nucleus in shells. b. Protons, which have no charge, occupy the nucleus. Positively charged neutrons and negatively charged electrons orbit the nucleus in shells. c. Protons, which have a positive charge, and electrons, which have a negative charge, occupy the nucleus. Neutrons with no charge orbit the nucleus in shells. d. Neutrons, which have no charge, occupy the nucleus. Positively charged protons and negatively charged electrons orbit the nucleus in shells. e. Protons, which have a positive charge, and neutrons, which have no charge, occupy the nucleus. Negatively charged electrons orbit the nucleus in shells.
A sequence of porous and permeable layers of sediment or rock that acts as a storage medium and transmitter of water is called a(n) _____
a. aquiclude b. aquifer c. geyser d. water table e. spring
In somebody's cognitive image of the United States, it is least likely that the Mississippi River is a(n)
A) node. B) path. C) edge. D) landmark.
In preparation for the construction of a new large subdivision, over 500 acres of hilly forest are cleared. In this cleared region, we will expect that
A) more species of birds and insects will inhabit the region. B) a drainage system and landscaping will need to be designed to limit erosion. C) the overall productivity of the region will increase. D) the levels of carbon dioxide in the air will sharply decline.