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प्रश्न
Fill in the blank with a suitable word:
The single-celled alga ______ measures 10 cm in length.
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उत्तर
The single-celled alga Acetabularia measures 10 cm in length.
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संबंधित प्रश्न
Write short notes on the following.
Nucleus of a cell
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
Name the scientist who invented the first microscope.
Try to find the names of four cell organells hidden in this maze, (hint: The hidden words can appear horizontally or vertically; forwards or backward or even mixed up). Write them in the lines provided. For example : “NUCLEUS” in the last row, seven backward letters.
| A | J | F | B | H | E | M | O | E | L | O | U | C | A | V |
| H | V | L | E | U | C | O | P | L | A | S | T | N | O | E |
| C | H | R | O | M | O | P | L | A | S | T | X | T | E | R |
| S | U | E | L | C | U | N | W | P | L | A | S | T | I | D |
Write a short answer.
Why are mitochondria called the powerhouse of the cell?
Match the items in column A with the appropriate items in column B:
| column A | column B |
| 1. Platform or workplace for the synthesis of proteins | a. Golgi complex |
| 2. A powerhouse of cells | b. Ribosomes |
| 3. Help in the formation of cell plate during cell division | c. Chloroplast |
| 4. Site for photosynthesis | d. Mitochondria |
| 5. Control tower of cell | e. Chromosomes |
| 6. A structure bearing genes | f. Nucleus |
An electron microscope is necessary for the study of ______.
Answer the following question.
Why is the cell called the structural and functional unit of life?
Under the microscope, Priya observes a cell that has a cell wall and distinct nucleus. The cell that she observed is
Who proposed the "Cell theory"?
