Explain the difference between r- and K-strategists. Where do these terms come from, and what are the characteristics of each broad category?
What will be an ideal response?
R-strategists (r-selected species) "produce massive numbers of young, but then leave survival to the whims of nature." On the other hand, K-strategists (K-selected species) "have a much lower reproductive rate (that is, a lower biotic potential), but then care for and protect the young until they can compete for resources with adult members of the population."
R-strategists are called so because they usually have high r values (the number of offspring that individuals can produce in a given amount of time if resources are unlimited). K-strategists are named as such because "their population sizes are more likely to fluctuate around the carrying capacity," termed K.
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A. heavy rainfall B. an earthquake C. road construction D. quickly melted snow E. a volcanic eruption
Most earthquakes occur along
A. major rivers. B. lines parallel with Earth's magnetic field. C. continental margins. D. plate boundaries.
While California has experienced many deadly earthquakes, it has never experienced fatalities from tsunami.
Answer the following statement true (T) or false (F)
The earliest fish were ____
a. ray-finned b. bony-finned c. cartilaginous d. jawless e. lungfish