In the 1920s and 1930s, terrible dust storms carried away tons of good soil from farmland in western Oklahoma. Which of the following would be a result?
A) reduction in carrying capacity
B) massive immigration
C) exponential growth of human population
D) shortening of the doubling rate
A
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In meiosis of oogenesis, how many mature eggs result?
a. one b. two c. three d. four e. five
Many forest plants and animals have been found to have chemicals in them that can be used for medicines. Which of the following is least helpful in preserving this resource?
A) eating more hamburgers B) limiting new housing developments C) encouraging paper and wood recycling D) promoting nut tree growing
A cell contains a higher concentration of a substance than its surrounding environment. The cell membrane is highly permeable to this substance. What will happen as a result of diffusion?
A) The cell membrane will keep the substance inside the cell. B) The cell membrane will allow the substance to move to the cell's environment. C) The cell membrane will use the process of active transport to take in more of the substance. D) The cell membrane will allow more of the substance to enter the cell.
Choose the letter of the best match from the following:A. hotspotB. habitat lossC. edge effectsD. megafaunal extinctionE. extinction vortexPrimarily due to habitat destruction, pollution, human disruption, fragmentation.
Fill in the blank(s) with the appropriate word(s).