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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.
APPEARS IN
संबंधित प्रश्न
Which of the following is not correct?
Growth of cell wall during cell elongation take place by ______.
A cell is the smallest unit of life.
Arrange in a correct sequence
Hen's Egg, Ostrich's egg, Insect's egg.
I convert the Sun’s energy into food for the plant. Who am I?______
Assertion (A): Tissue is a group of dissimilar cells.
Reason (R): Muscle is made up of Muscle cell.
On the lines given below, write about what you have learned from the activities done in this lesson.
Let me tell you about some of the important things I’ve learned about cells. First, I’ll start with…______
______ cells are specialised cells that can be transformed into any kind of cells.
______ is the basic structural and functional unit of every living organism.
Nowadays an ______ microscope is used to magnify and observe the cells.
In Latin, the word ‘cellula’ means a ______.
All the cells can be seen with our naked eye.
Cell theory was given by
A person takes concentrated solution of salt, after sometime, he starts vomiting. What is the phenomenon responsible for such situation? Explain.
Name the organelles which show the analogy written as under
Packaging and dispatching unit of the cell——
Why are lysosomes also known as “scavengers of the cells”?
Draw a plant cell and label the parts which
- determines the function and development of the cell
- packages materials coming from the endoplasmic reticulum
- provides resistance to microbes to withstand hypotonic external media without bursting
- is site for many biochemical reactions necessary to sustain life. (e) is a fluid contained inside the nucleus
Choose the correct statement:
Fill in the blanks with the terms given in the box below:
| Nucleus, chromosomes, cell wall, cell membrane, protoplasm, cytoplasm, ribosome, cell organelles |
The outermost layer of plant cells is the ___(a)___ beneath which is the ___(b)___. The term ___(c)___ refers to the jelly-like substance containing all the ___(d)___. The ___(e)___ contains thread-like structures called ___(f)___.
______ is the largest organelle.
