Q. Consider the following statements:
Statement-I: Tardigrades are among the most resilient animals which can survive extreme conditions such as exposure to outer space.
Statement-II: Tardigrades are able to menifest the process of cryptobiosis and anhydrobiosis very efficiently.
Which one of the following is correct in respect of the above statements?

[A] Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

[B] Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

[C] Statement-I is correct but Statement-II is incorrect

[D] Statement-I is incorrect but Statement-II is correct

Answer: A
Notes:

Explanation: Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

Scientific significance of Tardigrades

  • Resilient: They are among the most resilient animals which can survive extreme conditions such as exposure to outer space.
  • Cryptobiosis: They owe their incredible resilience to cryptobiosis.
    • It is a state in which organisms bring their metabolism to a near-complete standstill in the face of adverse environmental conditions.
  • Anhydrobiosis: Tardigrades can reduce their metabolism to less than 0.01% of normal, and drop their water levels by more than 95%, a state called anhydrobiosis.
  • Tun state: Both anhydrobiosis and cryptobiosis result in the emergence of a durable shrunken state, called tun, in which tardigrades are able to withstand extreme conditions.

Source: IE

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