Phytoremediation
a. involves the use of plants to remove contaminants from polluted soil and water
b. involves the use of microscopic filter-feeding organisms to filter contaminants from water
c. has been shown to be ineffective in the long term
d. is too costly to be practical
e. all of these answers
A
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Susan is conducting an experiment to see if plants will grow better with application of fertilizer. She separates 50 plants into two groups of 25. One group receives a liquid fertilizer when watered every other day, and the other group receives only water on the same days. The plants are kept in a greenhouse with constant and equal amounts of sunlight, and a constant temperature. She measures the plants once a week for 12 weeks. At the end of 12 weeks, the plants with the fertilizer grew an average of 9 inches, and the ones that were not given the fertilizer grew an average of 5 inches.When referencing the above scenario, why did Susan average the resulting heights of the plants?
A. To account for differences in temperature and sunlight between the groups. B. She liked showing off her knowledge of simple statistical analysis. C. To account for the genetic variation in the plants. D. Because two numbers are easier to compare than 50.
Which ethnic group is most common in Latin America and is a mix of Native American and Spanish heritage?
a. frias b. helandas c. Creoles d. mulattos e. mestizos
What forces related to plate tectonics can cause tectonic stress?
What will be an ideal response?
Anticyclones:
A) have air spiraling into them at lower elevations. B) have clockwise winds in the Northern Hemisphere. C) do not have winds in the upper atmosphere that follow height contours. D) are associated with subgeostrophic winds.