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1be introduced to a new area.2spread rapidly in this new area.3eliminate native species.Select one:a. 1, 2, and 3. b. only 2c. only 2 and 3.d. only 3e. only 1
A J-shaped population growth curve becomes an S-shaped oneSelect one:a. if the data are plotted on semi-log graph paper.b. if reproduction stops.c. as the carrying capacity is reached. d. as more resources become available.Cheatgrass has been able to invade dry, temperate grasslands and the arid, shrub-dominated habitats (sage-steppe) of North America. Which of the following is NOTa reason for this?Select one:a. Cheatgrass competes successfully with bunchgrasses for water and nutrients.b. All of these are valid reasons. c.Cheatgrass is somewhat fire tolerant.d. Cheatgrass promotes fire frequency and increases fire intensity.e. Cheatgrass is an annual, so there are seeds in the ground ready to grow any year.The population size that a particular habitat can support indefinitely is called theSelect one:a. cohortb. carrying capacity c. survivorship leveld. intrinsic sizeLook at the survivorship curves in your textbook. Which of the survivorship curves is/areassociated with organisms that have high mortality rates in the early stages of life?Select one:a. Type IIb. Type I and IIc. Type I d. Type I and IIIe. Type IIIFeedbackThe correct answer is: Type IIIIn the equation for logistic growth, when N = K