Unit 9 Target 3: Growth

Which statement best describes a population at, or near, its carrying capacity?a.    The birth and death rates of the population are approximately the same.    b.    The birthrate of the population is declining significantly.    c.    The overall population is increasing exponentially.    d.    The overall population is increasing exponentially.

Using the graph, determine which statement most likely describes the relationship between the population of organisms and the resources available to the population?a.    There are adequate resources to support this stable population.    b.    There are adequate resources to support this unstable population.    c.    There are inadequate resources to support this stable population.    d.    There are inadequate resources to support this unstable population.

Louise places 1 bacterium in a Petri dish at time 0. The population increases exponentially, doubling every hour, and there are no limiting factors. How many bacteria will be in the Petri dish after 6 hrs?a.    6          b.    16          c.    32         d.    64

For years, runoff from a nearby industrial plant has entered a certain lake. Environmental scientists observe that this runoff causes seasonal blooms of algae in the lake. Which graph illustrates the most likely algae growth pattern from the beginning to the end of the spring seasonal bloom?

According to these data, which is the most accurate comparison of the 2 species’ growth rates?a.    Both show exponential growth, but P. caudatum  has a higher rate of increase.    b.    Both show logistic growth, but P. caudatum has a higher rate of increase.    c.    P. caudatum shows exponential growth, but P. bursaria shows logistic growth.    d.    P. bursaria shows exponential growth, but P. caudatum shows logistic growth.

Which of the following statements must be true of a population experiencing exponential growth?a.    The members of the population are competing for limited resources.    b.    The population has more than enough resources to sustain a population.    c.    The population’s growth rate is slowing down.    d.    The population has reached carrying capacity.

Which of the following statements about carrying capacity is true?a.    There will be an increase in death rate.    b.    There will be more competition for resources.    c.    The birth rate of the population will be approximately zero.    d.    All of the above are true.