TLS Online TPP Program

#Question id: 5846


The bacteriophage can lysogenize after infecting a bacterium, i.e. integrate into the host bacterial chromosome by site-specific recombination, and may reside there for many generations before an excision event regenerates the viral genome in an infective form.  Which one of the following is not a component of these events?

#Unit 8. Inheritance Biology
  1. Excision requires two host proteins and two virally-encoded proteins.

  2. Integration requires a viral-specific protein, called integrase.

  3. RecA protein is required to catalyze the insertional recombination event.

  4. The excision event relies on different sequences than the integration event.

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TLS Online TPP Program

#Question id: 10231

#Unit 10. Ecological Principles

Character displacement is results of competition that its operates on a

TLS Online TPP Program

#Question id: 10232

#Unit 10. Ecological Principles

Which of the following is incorrect statement?

TLS Online TPP Program

#Question id: 10233

#Unit 10. Ecological Principles

Which of the following statements is the most appropriate define character displacement?

TLS Online TPP Program

#Question id: 10234

#Unit 10. Ecological Principles

You observed the two species of barnacles, species 1 and species 2, occupy upper and lower strata of intertidal rocks, respectively. Only when species 1 was removed by you from the upper strata, species 2 could occupy both the upper and lower strata. From the choice given below what would be your inference from these observations.

TLS Online TPP Program

#Question id: 10235

#Unit 10. Ecological Principles

Following some observation is correct about species of P, Q and R

A) Species P and R have generalized nich while Q has specialized nich

B) Species P and R have specialized nich while Q has generalized nich

C) Species P and R are more prone to extinct than Q species

D) Species Q is more prone to extinct than either P or R species


TLS Online TPP Program

#Question id: 10236

#Unit 10. Ecological Principles

Following figure represent fundamental and realized nich of species P and Q in gradient of temperature along sea shore. which of the following statement are correct? 


A) Fundamental niche of species P is greater than its realized nich

 B) Fundamental niche of species Q is greater than its realized nich

 C) Species Q is strong competitor than species P

 D) There is no effect on spaced occupied by Q in the presence or absence of species P