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प्रश्न
Cell is the basic unit of life. Discuss in brief.
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उत्तर
- The cell is the basic structural and functional building block of all life since, without cells, there could be no living thing. Every life starts off as a single cell.Either a single cell (unicellular) or several cells (multicellular) make up an organism.
- While each group of cells in a multicellular creature is specialised for a particular function, a single cell in a unicellular organism is capable of autonomous existence and may carry out all necessary life processes.
- Cells are the units of life that divide to create new ones, and these cells always come from the division of pre-existing ones.
- Due to the totipotency of cells, a single cell can develop into an entire creature. A cell is the fundamental building block of life since the actions of an organism are the culmination of the activities of its cells.
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संबंधित प्रश्न
Indicate whether the following statements are True (T) or False (F).
The basic living unit of an organism is an organ. (T / F)
Choose the correct option.
Cell Membrane is composed of ______.
Basis unit of life.
Suitable term for the various components of cell is ______.
Adipose: tissue:: eye: ______.
Assertion (A): Majority of cells cannot be seen directly with naked eye because.
Reason (R): Cells are microscopic.
Classify the following terms into cells, tissues, organs and write in the tabular column given below
Neuron, Lungs. Xylem, brain, adipose, Leaf, RBC, WBC, hand, muscle, heart, ovum, squamous, phloem, cartilage.
| Cell | Tissue | organ |
Nowadays an ______ microscope is used to magnify and observe the cells.
All the cells can be seen with our naked eye.
Analogy:
Smallest cell: virus.
Biggest cell: ______.
Which of the following can be made into crystal?
A cell will swell up if
We eat food composed of all the nutrients like carbohydrates, proteins, fats, vitamins, minerals, and water. After digestion, these are absorbed in the form of glucose, aminoacids, fatty acids, glycerol etc. What mechanisms are involved in absorption of digested food and water?
Name the organelles which show the analogy written as under
Transporting channels of the cell——
Name the organelles which show the analogy written as under
Power house of the cell——
Match the terms given in column I with their functions given in column II and fill the blanks given below the table:
| Column I | Column II |
| A. Chloroplast | i) carries hereditary characters |
| B. Cell membrane | ii) controls the activities of cells |
| C. Nucleus | iii) site of photosynthesis |
| D. Chromosome | iv) controls the movement of materials into and out of cells. |
A - ______; B - ______; C - ______; D - ______
What structural and functional attributes must a cell have to be called a living cell?
Name the following:
A pigment which is not found in plastids.
