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px3q - Practice Exam 3 questions Scendesmus grown alone...

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Practice Exam 3 questions Scendesmus grown alone reaches a carrying capacity of 10,000 cells per ml. Euglena grown alone reaches a carrying capacity of 15,000 cells per ml on the same media and light conditions. When they are grown together Scendesmus reaches a density of 12,000 cells per ml and Euglena reaches a density of 16,000 cells per ml. Based on these results what is the relationship between Scendesmus and Euglena ? A. predator, prey B. mutualism C. competition D. disease, host E. indifference Given one has estimated the abundance of each species in a community, species richness (SR) is: A. = 1 - Σp i 2 B. = -Σp i lnp i C. the number of species in a community D. proportional to lipid content E. all of the above The logistic model of population growth assumes that the per capita growth rate _____ with increasing population size. A. declines linearly B. declines exponentially C. is constant D. declines parabolically E. increases exponentially A disease that can kill infected individuals is said to be _________. The proportion of infected individuals
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