Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 14415
TLS Online TPP Program

#Question id: 4601

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?

#Section 2: Evolution

  1. All habitats should have received applications of DDT at about the same time.

  2. The frequency of DDT application should have been higher.

  3. None of the insect pests would have genetic variations that resulted in DDT resistance.

  4. DDT application should have been continual.

More Questions
TLS Online TPP Program

#Question id: 10725

#Section 1: Ecology

While studying the diversity of 3 communities, 5 species and 50 individuals were recorded from each community. The number of individuals under each species was listed as mentioned in the following Table.  


Which of the following is decreasing order of evenness of community?
TLS Online TPP Program

#Question id: 5155

#General Aptitude

Find the Unit digit of (432)412 X (499)431
TLS Online TPP Program

#Question id: 4633

#Section 2: Evolution

Natural selection is based on all of the following except
TLS Online TPP Program

#Question id: 12141

#Section 2: Evolution

The density and spacing of individuals within suitable habitat and the proportions of individuals in each age class comprise a population's __________. 
TLS Online TPP Program

#Question id: 3414

#Section 2: Evolution

The given below is the graphical representation of the changes in morphological features over a period of the geological time scale, where population A accumulates heritable morphological features and give rise to distinct species B. Population B splits in to a distinct species B1 and B2 Which of the following lineage represent the pattern of speciation by cladogenesis?