Biology
Surya transferred a fish commonly found in sea water into a pond. After some time, he noticed that the fish died. The possible reason(s) for this could be :
- Turgidity and Flaccidity
- Plasmolysis
- Plasmolysis and Flaccidity
- Turgidity
Roots Absorption
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Answer
Turgidity
Reason — A sea-water fish is adapted to a hypertonic environment. When it is transferred to pond water, which is hypotonic, water enters its body cells by osmosis. This disturbs the osmotic balance and may lead to the death of the fish.
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Related Questions
Mary soaked some raisins in beakers containing sugar solution, distilled water, salt solution and sea water respectively. After a couple of days, she observed that raisins have changed their shapes. In which of the following solutions will the raisins become turgid ?
- Sugar solution
- Distilled water
- Salt solution
- Sea water
Figures A and B show plant cells after being kept for some time in two different solutions. Solutions A and B are:
- A-Hypotonic and B-Hypertonic
- A-Hypertonic and B-Hypotonic
- A-Isotonic and B-Hypertonic
- A-Hypotonic and B-Isotonic
Assertion (A): Roots absorb water and mineral nutrients from the soil.
Reason (R): Soil is the storehouse of all the essential minerals for photosynthesis that are absorbed by the plant through the roots of the plant by the process of diffusion.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion (A): Diffusion is the process of free movement of liquid molecules only. It does not occur in gaseous state.
Reason (R): The main condition which regulates the process of diffusion is the concentration gradient and not the state of matter. It always occurs from higher to lower concentration.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.