TLS Online TPP Program

#Question id: 5760


The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that

#XL - S Microbiology
  1. T1 phage was a mutagen.

  2. Mutations could arise prior to the time they were selected

  3. The mutation rate varies greatly from experiment to experiment.

  4. In E. coli the number of mutants per clone was relatively constant.

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TLS Online TPP Program

#Question id: 3259

#XL - T Zoology

Different type of evolution leads to group of taxon in following three manners

A- group of taxon whose member have descended from common ancestor

B- when two lineages convergently  evolve similar character states form  groups that are recognized by pheneticists

c. taxon that include most recent ancestor but not all of its descendent

TLS Online TPP Program

#Question id: 3260

#XL - T Zoology

Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1 genotype is 0.04) The frequency of A2 allele is

TLS Online TPP Program

#Question id: 3261

#XL - T Zoology

A parent population (P) is change into daughter populations (Q) which grow in habitats. After 1000 generations, the equilibrium frequency distribution of of the daughter populations is shown in the figure below. For reference, the vertical line represents the mean of the parent population. Which type of natural selection?

TLS Online TPP Program

#Question id: 3262

#XL - T Zoology

In a population, the genotype frequencies are: f(A1A1)= 0.35; f(A1A2) = 0.30; f(A2A2) = 0.35; Which of the following statement is correct?

TLS Online TPP Program

#Question id: 3263

#XL - T Zoology

From an evolutionary point of view, plant tendrils derived from leaves and those derived from stems are examples of

TLS Online TPP Program

#Question id: 3429

#XL - T Zoology

Which of the following is a behavioral pattern that results from a proximate cause?