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#Question id: 4569


Which of the following must exist in a population before natural selection can act upon that population?

#SCPH05 I Biotechnology
  1. Genetic variation among individuals

  2. Variation among individuals caused by environmental factors

  3. Sexual reproduction

  4. B and C only


Answer:- Option(s): 1


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#Question id: 1393

#SCPH05 I Biotechnology

In research on aging (both cellular aging and organismal aging), it has been found that aged cells do not progress through the cell cycle as they had previously. Which of the following, if found in cells or organisms as they age, would provide evidence that this is related to cell signalling?

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#Question id: 3897

#SCPH06 I Botany

Gene silencing by RNA interference acts by of the target gene.

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#Question id: 11192

#I Life Science/ Life Sciences Group – I-V

A graded hyperpolarization of a membrane can be induced by ________.

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#Question id: 10351

#SCPH06 I Botany

Plants contain two types of GOGAT; one accepts electrons from NADH, and the other accepts electrons from ferredoxin (Fd); which one of the following statements is correct?

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#Question id: 2629

#SCPH28 | Zoology

Case of constitutive mutants,

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