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प्रश्न
Which of the following is not correct?
विकल्प
Robert Brown discovered the cell.
Schleiden and Schwann formulated the cell theory.
Virchow explained that cells are formed from pre-existing cells.
A unicellular organism carries out its life activities within a single cell.
उत्तर
Robert Brown discovered the cell.
Explanation:
Robert Hooke discovered the cell and Robert Brown discovered the nucleus in the cell.
APPEARS IN
संबंधित प्रश्न
Indicate whether the following statements are True (T) or False (F).
Unicellular organisms have one-celled body. (T / F)
Make a sketch of the human nerve cell. What function do nerve cells perform?
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.
______ cells are specialised cells that can be transformed into any kind of cells.
Define - Prokaryotic cell.
In Latin, the word ‘cellula’ means a ______.
The branch of science that deals with the study of cells is called ______.
Which of the following can be made into crystal?
A cell will swell up if
Do you agree that “A cell is a building unit of an organism”. If yes, explain why?
Name the organelles which show the analogy written as under
Packaging and dispatching unit of the cell——
Choose the correct statements.
Which of the following is not a 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 - ______
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)___.
The smallest cell in the human body is ______.
______ first saw and described a live cell.
