Discuss how the evolution of jawed fishes and other predatory creatures affected the marine
ecosystem. What will be an ideal response?
The development of jaws was a major evolutionary advance because jawed fish could chew food
and become active predators, opening new ecologic niches. Natural selection favored organisms
that could protect themselves, or hide, from these predators.
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Some car batteries require the periodic addition of water. Does adding the water increase or decrease the battery's ability to provide electric power to start the car?
A. It will decrease the battery's ability to provide electrical power because water increases the surface area of the electrode in contact with the solution. B. It will decrease the battery's ability to provide electrical power because it will dilute the amount of ions in contact with the electrode. C. It will increase the battery's ability to provide electrical power because of the positive effect of diluting the ionic solution. D. It will increase the battery's ability to provide electrical power because it will decrease the number of ions in contact with the electrode.
Variations in specific humidity vary primarily as a function of
A) path of midlatitude cyclones. B) distance from oceans. C) distance from cities. D) latitude.
The first step in changing atmospheric nitrogen into more usable NH3 is called ________
A) nitrification B) ammonification C) denitrification D) nitrogen fixation
The highest level of economic integration is the ________ ________
Fill in the blank(s) with correct word