Invasive species represent a threat to biodiversity worldwide. Based on either the examples presented in the textbook or outside sources, describe several invasive species of concern in your area
What factors contributed to their spread? Why are these species of concern, both in a broad context, as well as within your area.
Answers will vary depending on where students live. Examples in the book that are fairly common throughout the United States include zebra mussels, Russian olive, kudzu, and purple loosestrife.
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Erosion can result in a vicious cycle of worsening erosion because
A) rainwater increasingly soaks into the ground. B) the accumulation of humus makes erosion more likely. C) plants are less likely to grow in an eroded region. D) the pH of the soil increases as erosion continues.
________ _______ or ________ - the number of plant and animal species present and the variety of genetic materials these organisms contain
Fill in the blank(s) with correct word
Thermal lows form in response to variations in surface air temperature.
a. True b. False
Converging surface waters are areas of ________ and ________ productivity
A) downwelling; high B) downwelling; low C) upwelling; high D) upwelling; low