The fossil record shows a sequence of variations based on what?
A)density of organisms
B)shape of organisms
C)size of organisms
D)different life forms
E)number of life forms
D
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What is the most abundant chemical element in the Earth's crust?
A. Iron B. Oxygen C. Silica D. Aluminum
Which of the following is true of immunoglobulins?
A) Only the heavy chains have variable regions. B) Only the light chains have variable regions. C) Both the light and the heavy chains have variable regions. D) Neither the light chains nor the heavy chains have variable regions.
Which is not one of the five qualities of an effective environmental leader?
A) Value diversity B) Be motivated C) Unwilling to compromise with industry D) Motivated by clearly laid out values E) Willing to act and focus on outcomes
At high latitudes the thermocline is ________
A) about the same as at low latitudes B) narrower than at low latitudes C) wider than at low latitudes D) There is no thermocline at high latitudes. E) There is no thermocline at low latitudes.