Based on the number of cells organisms can be differentiated into two types :- Unicellular and Multicellular.
The main differences between the two type of cells are listed below in the table.
Unicellular organisms |
Multicellular Organisms |
|
Definition |
These are formed of single cell. | These are formed of more than one cell. |
Cell size | 10 - 100 micrometers | 5 - 10 micrometers |
Origin | They have evolved earlier around 3.5 thousand million years ago. | They have evolved from unicellular organisms 1.2 thousand million years ago. |
Based on the number of cells organisms can be differentiated in ______________________. | |||
Right Option : D | |||
View Explanation |
Which of the following are correct / (a) The unicellular organisms have evolved earlier around 3.5 thousand years ago . (b) Amoeba, bacteria ,paramecium are the examples of Multicellular organisms | |||
Right Option : A | |||
View Explanation |
________________________ organisms have evolved earlier around 3.5 thousand million years ago. | |||
Right Option : A | |||
View Explanation |
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