Phylogenetic trees __________.
Fill in the blank(s) with the appropriate word(s).
Ans: trace the flow of evolutionary change and diversification for a particular group of organisms
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Which of the following are true about factors that influence weathering?
A) Chemical weathering occurs fastest in cold or dry climates. B) Whether a slope faces toward or away from the sun is not an important factor influencing weathering. C) Soil and other weathering products tend to accumulate more on gentle slopes than on steep slopes. D) Time is not a critical factor in weathering because physical and chemical processes have not changed much through time.
What characterizes rates of natural population growth in the first stage of demographic transition?
A) often negative B) relatively low, often fluctuating around zero C) relatively high, which indicates economic progress D) extremely high, which reflects improvements in medicine E) the rates cannot be calculated
The hypsometric curve shows sea level. What would happen if you raised (lowered) sea level by 1 kilometer?
a) Raising and lowering sea level would inundate or expose about the same amount of the Earth's surface. b) Raising sea level would inundate most of the continental lowlands, but lowering sea level would expose a much smaller area. c) The percentage of land and ocean would remain about the same. d) Both raising and lowering would expose more land. e) Raising sea level by that amount would cover all land, and lowering by the same amount would expose most of the ocean bottom.
Which environmental sphere encompasses all of life on Earth?
A. atmosphere B. hydrosphere C. cryosphere D. biosphere E. lithosphere