Phylogenetic trees ________
A) trace the flow of evolutionary change and diversification for a particular group of organisms
B) have branches each of which represents an extinction event
C) are usually at odds with fossil evidence
D) predict future evolutionary trends
E) are a threatened species in Costa Rica's Monteverde National Park
A
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Three dimensional effects are best obtained with ________.
A. Thermal scanners B. Ultraviolet photographs C. Color infrared photography D. Vertical aerial photographs E. None of the above
A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The acceleration of a mass of 2 kg acted upon by a force of 2 N is
A) half as much. B) twice as much. C) the same. D) none of the above
What hypothesis has been presented for the close parallel relationship of the magnetic field and the rotation axis?
A) Rotation causes spiraling convection currents in the outer core. B) Rotation causes spiraling convection currents in the outer mantle. C) Rotation causes spiraling convection currents in the inner mantle. D) Rotation causes spiraling convection currents in the inner core.
The elapsed time between two crossings of the equator by the Sun is known as the ________
A) parallelism. B) summer. C) inter-equinox. D) tropical year.