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प्रश्न
Who discovered cells and how?
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उत्तर
- The cell was discovered in 1665 by Robert Hooke. Using a crude microscope he had made himself, he studied a thin slice of cork and noticed that it had many tiny compartments, much like a honeycomb.
- The term "cells" that he gave them is a translation of the Latin word "cellula," which means "a little room."
संबंधित प्रश्न
Write short notes on the following.
Nucleus of a cell
Which part of the cell contains organelles?
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 |
Why was the invention of the microscope so important to the study of living beings?
Who proposed the Cell theory? Explain the main points of this theory.
What is the function of the following?
Cell membrane
Fill in the blank with a suitable word:
The single-celled alga ______ measures 10 cm in length.
Fill in the blank with a suitable word:
Cell ______ was proposed by Schleiden and Schwann.
Which is the smallest cell?
