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TLS Online TPP Program

#Question id: 12322

Which of the following could qualify as a top-down control on a grassland community? 

#Section 1: Ecology
  1. Limitation of plant biomass by rainfall amount
  2. Influence of temperature on competition among plants
  3. Influence of soil nutrients on the abundance of grasses versus wildflowers
  4. Effect of grazing intensity by bison on plant species diversity

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TLS Online TPP Program

#Question id: 3341

#Section 2: Evolution

In a given population of 400 individuals, 64 percent of population is caused  cancer due to completely dominat allele B. Assuming the population is in Hardy- Weinberg equilibrium, which of the following is the expected proportion of individuals who are not expected to develop the cancer?
TLS Online TPP Program

#Question id: 3361

#Section 2: Evolution

In a population 16% individual affected with autosomal recessive diseased. how many are expected to be normal phenotype if population size is 250 ?
TLS Online TPP Program

#Question id: 12575

#Section 5: Applied Ecology & Evolution

All of the following are adaptations that permit the camel to be active by day in the desert EXCEPT 
TLS Online TPP Program

#Question id: 12455

#Section 1: Ecology

When does the growth rate of a natural population equal zero?
TLS Online TPP Program

#Question id: 4652

#Section 2: Evolution

The graph depicts four possible patterns for the abundance of 3TC-resistant HIV within an infected human over time. If 3TC resistance is costly for HIV, then which plot (I—IV) best represents the response of a strain of 3TC-resistant HIV over time, if 3TC administration begins at the time indicated by the arrow?