Human-caused disturbances of the ________ cycle may be contributing to global warming
A) hydrologic B) oxygen C) phosphorus D) carbon E) sulfur
D
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High ____ concentrations in Lake Erie encouraged the growth of photosynthetic algae, which changed the
phytoplankton community.
a. sewage b. detergent c. coliform bacteria d. phosphorous e. dead fish
Ions can be moved against the concentration gradient to create a difference in charge across that membrane. Later, the electrochemical gradient can be exploited by the cell to drive other processes. Respectively, what are these two mechanisms called?
a. primary passive transport, secondary passive transport b. primary sodium transport, secondary potassium transport c. primary active transport, secondary active transport d. primary electrical transport, secondary electrical transport
Many jellyfish rely on currents for movement because they are not strong swimmers, making them ________
a. nekton b. mesoglea c. pelagic d. plankton
Which term refers to the structure and arrangement of the internal parts of a plant?
a. anatomy b. ecology c. morphology d. physiology