Long-term cultural evolution in humans is largely based on a scale of ...... .

  • A
    The ability of humans to alter their fertility.
  • B
    Increase in food production.
  • C
    Colonization of sparsely populated areas.
  • D
    Control of human diseases.

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When two unrelated individuals or lines are crossed,the performance of $F_1$ hybrid is often superior to both its parents. This phenomenon is called

$A$: Improved varieties with genetic variations can be obtained through plant breeding.
$R$: The main objectives of plant breeding are similar to those of animal breeding.

Which of the following is an incorrect pair regarding the major dairies of Gujarat?

Choose the incorrect statement.

Crop cultivation was first started in

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