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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 ______.
Suitable term for the various components of cell is ______.
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 |
The branch of science that deals with the study of cells is called ______.
The cell is self-sufficient and carries out all the fundamental and essential functions of an organism.
How do you distinguish between living and dead cells?
Name the largest Angiosperm cell
Which of these options are not a function of Ribosomes?
- It helps in manufacture of protein molecules
- It helps in manufacture of enzymes
- It helps in manufacture of hormones
- It helps in manufacture of starch molecules
Cell wall of which one of these is not made up of cellulose?
Cell arises from pre-existing cell was stated by
Do you agree that “A cell is a building unit of an organism”. If yes, explain why?
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
Packaging and dispatching unit of the cell——
Choose the correct statement with respect to unicellular organisms.
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 - ______
The smallest cell in the human body is ______.
______ first saw and described a live cell.
Give two examples of stains which make the nucleus distinct.
