Seismic waves are like
A) X-rays, because they let us see into Earth.
B) radio waves, because they are of similar length.
C) sound waves, because they are longitudinal.
D) ocean waves, because they are transverse.
C
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Using the Darwin-Wallace mechanism of natural selection, describe how the long necks of
giraffes evolved. What will be an ideal response?
Which of the following is typically a pioneer organism that colonizes the surface of bare rocks?
A. lichens B. fungi C. algae D. humus
What is the study of the balance between environmental factors and organisms in a community?
A) Ecology B) Biodiversity C) Niche D) Ecosystem
Volcanic eruptions can produce huge floods by
A) melting ice sheets.
B) erupting huge quantities of water vapor.
C) displacing water in lakes.