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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.
Q. The structural and functional unit of life is
- a)Cell
- b)Tissue
- c)Mitochondria
- d)Chloroplast
Correct answer is option 'A'. Can you explain this answer?
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Direction: All living Organisms are made up of cells and these cells ...
Cell is the basic building block of all living organisms and perform all the activities required to sustain life. So, it is the structural and functional unit of life.
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Direction: All living Organisms are made up of cells and these cells ...
**The Structural and Functional Unit of Life: Cell**
The structural and functional unit of life is the cell. All living organisms are made up of cells, which are the basic building blocks of life. Cells perform various functions that are essential for the survival of the organism. These functions include respiration, digestion, excretion, and many others.
**Explanation:**
**1. Definition of a Cell:**
A cell is the smallest structural and functional unit of an organism that is capable of independent existence. It is the basic unit of life, and all living organisms are composed of one or more cells. Cells are microscopic in nature and can only be observed under a microscope. They vary in size, shape, and function depending on the type of organism.
**2. Characteristics of Cells:**
Cells possess certain characteristics that make them unique and essential for life. These characteristics include:
- Cells are surrounded by a plasma membrane that separates the internal contents of the cell from the external environment.
- Cells contain genetic material, either in the form of DNA or RNA, which carries the genetic instructions necessary for the functioning and reproduction of the organism.
- Cells have the ability to replicate and divide, allowing for growth, development, and repair of tissues and organs.
- Cells have the capacity to convert nutrients into energy through various metabolic processes.
**3. Functions of Cells:**
Cells perform a wide range of functions that are essential for the survival of the organism. Some of the important functions carried out by cells include:
- Respiration: Cells take in oxygen and release carbon dioxide through the process of respiration, which provides energy for various cellular activities.
- Digestion: Cells break down complex molecules into simpler forms through the process of digestion, allowing for the absorption and utilization of nutrients.
- Excretion: Cells eliminate waste products and toxins through the process of excretion, maintaining the internal environment of the organism.
- Reproduction: Cells have the ability to reproduce and divide, allowing for the growth, development, and repair of tissues and organs.
- Sensitivity: Cells can detect and respond to changes in their environment, allowing organisms to adapt and survive in different conditions.
**Conclusion:**
In conclusion, cells are the structural and functional units of life. They perform various functions that are essential for the survival of the organism. Whether an organism is unicellular or multicellular, cells are responsible for carrying out all the necessary life processes. Thus, the correct answer to the given question is option 'A' - Cell.
The structural and functional unit of life is the cell. All living organisms are made up of cells, which are the basic building blocks of life. Cells perform various functions that are essential for the survival of the organism. These functions include respiration, digestion, excretion, and many others.
**Explanation:**
**1. Definition of a Cell:**
A cell is the smallest structural and functional unit of an organism that is capable of independent existence. It is the basic unit of life, and all living organisms are composed of one or more cells. Cells are microscopic in nature and can only be observed under a microscope. They vary in size, shape, and function depending on the type of organism.
**2. Characteristics of Cells:**
Cells possess certain characteristics that make them unique and essential for life. These characteristics include:
- Cells are surrounded by a plasma membrane that separates the internal contents of the cell from the external environment.
- Cells contain genetic material, either in the form of DNA or RNA, which carries the genetic instructions necessary for the functioning and reproduction of the organism.
- Cells have the ability to replicate and divide, allowing for growth, development, and repair of tissues and organs.
- Cells have the capacity to convert nutrients into energy through various metabolic processes.
**3. Functions of Cells:**
Cells perform a wide range of functions that are essential for the survival of the organism. Some of the important functions carried out by cells include:
- Respiration: Cells take in oxygen and release carbon dioxide through the process of respiration, which provides energy for various cellular activities.
- Digestion: Cells break down complex molecules into simpler forms through the process of digestion, allowing for the absorption and utilization of nutrients.
- Excretion: Cells eliminate waste products and toxins through the process of excretion, maintaining the internal environment of the organism.
- Reproduction: Cells have the ability to reproduce and divide, allowing for the growth, development, and repair of tissues and organs.
- Sensitivity: Cells can detect and respond to changes in their environment, allowing organisms to adapt and survive in different conditions.
**Conclusion:**
In conclusion, cells are the structural and functional units of life. They perform various functions that are essential for the survival of the organism. Whether an organism is unicellular or multicellular, cells are responsible for carrying out all the necessary life processes. Thus, the correct answer to the given question is option 'A' - Cell.
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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer?
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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer?.
Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. The structural and functional unit of life isa)Cellb)Tissuec)Mitochondriad)ChloroplastCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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