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While doing some experiment with Amoeba ...

While doing some experiment with Amoeba proteus in a culture medium, it was found that the contractile vacuole of the protozoan disappeared although the other organelles showed normal activity. This must have been most probably due to

A

change in the temperature of the medium

B

change in the pH of the medium

C

dilution of the medium with tap water

D

dilution of the medium with sea water

Text Solution

Verified by Experts

The correct Answer is:
D
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A biologist was experimenting with a protozoan and noticed that the animal's contractile vacuole stopped working although the other parts of the organism seemed to be in good health and exhibited normal activity. Which of the following experiment was likely to have produced this result?

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TRUEMAN BIOLOGY-EXCRETORY PRODUCTS AND THEIR ELIMINATION-MULTIPLE CHOICE OUESTIONS
  1. Consider the following statements For osmoregulation in aquatic medi...

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  2. The human kidney :-

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  3. While doing some experiment with Amoeba proteus in a culture medium, i...

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  4. The nephron is a hollow, convoluted tube of cells. It is engineered to...

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  5. A substance is present in concentration of 2 mg % in the afferent arte...

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  6. NaCl is more in the interstitial fluid of renal medulla than of cortex...

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  7. Antidiuretic hormone has the most abundant receptors in the kidneys of

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  8. All of the following are true except

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  9. Which of the following statements is correct?

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  10. The pH of human urine is approximately

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  11. Which one of the following statements is incorrect?

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  12. Which of the following pairs is wrong ?

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  13. Which one of the following statements is incorrect?

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  14. Dialysing unit (artificial kidney) contains a fluid which is almost sa...

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  15. Which one of the following four secretions is correctly matched with i...

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  16. Which one of the following statements is correct with respect to salt ...

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  17. Find out the correct statement about the loop of Henle

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  18. A terrestrial animal must be able to

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  19. In Ornithine cycle which one pair of the following wastes as removed f...

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  20. The net pressure gradient that causes the fluid to filter out of the g...

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