Biology
Given below is the diagram of a cell as seen under the microscope after having been placed in a solution:
(i) What is the technical term used for the state/condition of the cell given above ?
(ii) Give the technical term for the solution in which the cell was placed.
(iii) Name the parts numbered 1 to 4.
(iv) Is the cell given above a plant cell or an animal cell? Give two reasons in support of your answer as evident from the diagram.
(v) What would you do to bring this cell back to it original condition?
Roots Absorption
ICSE 2012
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Answer
(i) Plasmolysed
(ii) Hypertonic solution
(iii) The parts numbered 1 to 4 are:
- 1 → Nucleus
- 2 → Chloroplast
- 3 → Vacuole
- 4 → Hypertonic solution
(iv) Plant cell because of the following reasons:
- Clear distinct cell wall is seen
- Chloroplast clearly seen in the cytoplasm.
- Centrosome not seen.
(v) Place it in a hypotonic medium or plain water for some time.
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Related Questions
Given below is an experimental set up to demonstrate a particular process. Study the same and answer the questions that follow:
(i) Name the physiological process being studied.
(ii) Explain the process mentioned above.
(iii) What is the aim of the above experiment ?
(iv) What would you observe in the experimental set-up after an hour? Give a reason to support your answer.
(v) Mention any three adaptations found in plants to overcome the physiological process mentioned in (i) above.
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(ii) The suppressed allele of a gene.
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(v) Protective coverings located round the human brain and spinal cord.
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(vii) Hormones which stimulate other endocrine glands to produce their specific hormones.
(viii) The phase in the menstrual cycle in which the remnant of follicle in the ovary turns to Corpus luteum.
(ix) Statistical study of human population.
(x) Artificially introducing weakened germs or germ substance into the body for developing resistance to a particular disease.
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