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TLS Online TPP Program

#Question id: 1062

Using phages to treat a bacterial infection is an interesting idea because

#Unit 4. Cell Communication and Cell Signaling

  1. a single type of phage can destroy a wide range of strains of the same pathogen.

  2. of the increasing problem of antibiotic resistance.

  3. lysed bacteria pose no threat.

  4. a single phage can be genetically engineered to infect many different species of bacteria.

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TLS Online TPP Program

#Question id: 13140

#Unit 10. Ecological Principles

One summer the moose population on Island was unusually high, and park naturalists noticed signs of malnutrition among the  adults.  The wolf population  was  fairly  low,  near  20.  That  winter,  for  the  first  time  in  many  years,  a substantial  number of seemingly healthy adult moose as well as calves and crippled animals were killed and eaten by wolves. This description is part of a general situation in which the wolf and moose populations
TLS Online TPP Program

#Question id: 13139

#Unit 10. Ecological Principles

The logistic equation above is used to describe the rate of change of a population, N, with time, t, where r is the intrinsic rate of increase and K is the carrying capacity. Which of the following statements is true for this equation?
TLS Online TPP Program

#Question id: 13138

#Unit 10. Ecological Principles

Life-history characteristics associated with K-selected ordgtanisms include K
TLS Online TPP Program

#Question id: 13137

#Unit 10. Ecological Principles

Reproductive value (Vx ) calculated from population life-table data provides a measure of the 
TLS Online TPP Program

#Question id: 13136

#Unit 10. Ecological Principles

The figure below illustrates the relationship between population density in the present generation (Nt) and population equilibrium density of this population in the next generation (Nt+1). The dashed reference line has a slope of 1. Which of the following represents equilibrium density of this population?
TLS Online TPP Program

#Question id: 13134

#Unit 10. Ecological Principles

Which  of  the  graphs  below  represents the  relationship between  population  size  (N)  and  population  growth  rate (dN/dt) for a population showing exponential growth?