Given that the average duplication time of $E. coli$ is $20$ minutes, how much time will two $E. coli$ cells take to become $32$ cells?

  • A
    $60$ minutes
  • B
    $80$ minutes
  • C
    $100$ minutes
  • D
    $120$ minutes

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Polytene chromosomes in salivary glands of Drosophila are formed as a result of

$(1)$ Definition / Explanation: Mitosis
$(2)$ Definition / Explanation: Meiosis

$A$ bacterium divides every $35$ minutes. If a culture containing $10^5$ cells per $ml$ is grown for $175$ minutes,what will be the cell concentration per $ml$ after $175$ minutes?

Match the following columns:
$I$. Interkinesis$A$. Synapsis
$II$. Interphase$B$. Formation of bipolar spindle
$III$. Zygotene$C$. $DNA$ replication
$IV$. Diakinesis$D$. Stage between two meiotic divisions

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During which phase do the centromeres lie on the equatorial plate and the arms point towards the poles?

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