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TLS Online TPP Program

#Question id: 11353

Prior to the availability of a measles vaccine, outbreaks of measles occurred at two-year intervals, why?

#Section 1: Ecology
  1. Measles outbreaks occurred during hard winters, which happen every other year
  2. Two years were required for accumulation of enough susceptible infants
  3. Immunity to measles wore off in about two years
  4. Two years were required for the measles virus to disperse from tropical sources
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TLS Online TPP Program

#Question id: 12689

#General Aptitude

The ratio of the area of a squareto that of the square drawn on its diagonal is :
TLS Online TPP Program

#Question id: 10893

#Section 1: Ecology

The ___________ holds that two species with the same ecological requirements cannot coexist.
TLS Online TPP Program

#Question id: 4953

#Section 2: Evolution

Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which graph below, if the results were produced abiotically, would have the greatest promise for revealing important information about the origin or Earthʹs first genetic system?
TLS Online TPP Program

#Question id: 11715

#Section 2: Evolution

The lifetime dispersal area of a particular species of drosophila is 0.2 km2. What else would we need to know to determine the neighbourhood size for this species?
TLS Online TPP Program

#Question id: 10856

#Section 1: Ecology

By inhibiting sexual reproduction by their hosts, what advantage is gained by parasites such as endophytic fungi?