TLS Online TPP Program

#Question id: 1506


An oncogene codes for a growth factor receptor that is constitutively active. Of the following statements about a culture of cells expressing this gene, which would you expect to be true?

#Unit 4. Cell Communication and Cell Signaling
  1. The cells would be stimulated to divide by addition of growth factors to the medium.

  2. Cells in the culture would have no response to the addition of growth factors.

  3. Cells in the culture would be arrested in the Go phase of the cell cycle.

  4. None of the above.

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TLS Online TPP Program

#Question id: 3258

#Unit 11. Evolution and Behavior

Which of the following incorrect about genetic drift

TLS Online TPP Program

#Question id: 3259

#Unit 11. Evolution and Behavior

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

#Unit 11. Evolution and Behavior

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

#Unit 11. Evolution and Behavior

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

#Unit 11. Evolution and Behavior

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

#Unit 11. Evolution and Behavior

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