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When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will [2004] a) increase in the number b) disappear c) increase in size d) decrease in size The correct answer is option 'B'. Can you explain this answer?
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When a fresh-water protozoan possessing a contractile vacuole, is plac...
Vaculole will disappear becz fresh water protozoans only require contractile vaculole as they in live in hypotonic condition they need to remove excess of water nd need to store salts but in marine condition is hypertonic they need to store water.
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When a fresh-water protozoan possessing a contractile vacuole, is plac...
The correct answer is b) disappear.
Explanation:
When a fresh-water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the contractile vacuole will disappear.
1. What is a contractile vacuole?
- A contractile vacuole is a specialized organelle found in many freshwater protozoans, such as Paramecium.
- It functions to remove excess water from the cell to maintain osmotic balance.
- Freshwater environments have a lower concentration of solutes compared to the cytoplasm of the protozoan, so water constantly enters the cell by osmosis.
2. Osmosis and freshwater protozoans:
- In freshwater, the surrounding environment has a lower concentration of solutes compared to the cytoplasm of the protozoan.
- As a result, water constantly enters the cell by osmosis, leading to an increase in the volume of the cell.
- To prevent the cell from bursting, freshwater protozoans possess contractile vacuoles.
3. Marine water and contractile vacuole:
- In marine water, the surrounding environment has a higher concentration of solutes compared to the cytoplasm of the protozoan.
- Unlike freshwater, the concentration of solutes in the surrounding marine water is higher than in the protozoan's cytoplasm.
- Therefore, water will tend to move out of the cell by osmosis, instead of entering the cell as in freshwater.
- Since there is no excess water to remove, the contractile vacuole becomes unnecessary and will disappear.
In conclusion, when a fresh-water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the contractile vacuole will disappear. This is because the higher concentration of solutes in the marine water causes water to move out of the cell by osmosis, eliminating the need for the contractile vacuole to remove excess water.
Explanation:
When a fresh-water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the contractile vacuole will disappear.
1. What is a contractile vacuole?
- A contractile vacuole is a specialized organelle found in many freshwater protozoans, such as Paramecium.
- It functions to remove excess water from the cell to maintain osmotic balance.
- Freshwater environments have a lower concentration of solutes compared to the cytoplasm of the protozoan, so water constantly enters the cell by osmosis.
2. Osmosis and freshwater protozoans:
- In freshwater, the surrounding environment has a lower concentration of solutes compared to the cytoplasm of the protozoan.
- As a result, water constantly enters the cell by osmosis, leading to an increase in the volume of the cell.
- To prevent the cell from bursting, freshwater protozoans possess contractile vacuoles.
3. Marine water and contractile vacuole:
- In marine water, the surrounding environment has a higher concentration of solutes compared to the cytoplasm of the protozoan.
- Unlike freshwater, the concentration of solutes in the surrounding marine water is higher than in the protozoan's cytoplasm.
- Therefore, water will tend to move out of the cell by osmosis, instead of entering the cell as in freshwater.
- Since there is no excess water to remove, the contractile vacuole becomes unnecessary and will disappear.
In conclusion, when a fresh-water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the contractile vacuole will disappear. This is because the higher concentration of solutes in the marine water causes water to move out of the cell by osmosis, eliminating the need for the contractile vacuole to remove excess water.
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When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will [2004] a) increase in the number b) disappear c) increase in size d) decrease in size The correct answer is option 'B'. Can you explain this answer?
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When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will [2004] a) increase in the number b) disappear c) increase in size d) decrease in size The correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will [2004] a) increase in the number b) disappear c) increase in size d) decrease in size The correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will [2004] a) increase in the number b) disappear c) increase in size d) decrease in size The correct answer is option 'B'. Can you explain this answer?.
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