Evolution and Classification
Evolution and Classification
Evolution and Classification: Evolution is the process by which newer types of organisms are developed from the pre-existing ones through modification. Characteristics are the details of appearance or behaviour; in other words, a particular form or a particular function, e.g. the forelimbs of human beings is a characteristic and that the plants can perform photosynthesis is also a characteristic. Classification is the arrangement of organisms into a series of group based on physiological, biochemical, anatomical or other relationships. All systems of classification are hierarchial. Hierarchy is a type of social organisation in which individuals are ranked according to their status or dominance relative to the members of their groups.
Basic Characteristics of an Organism:
· Cell is the basic unit of life in all organisms.
· Cells of some organisms do not have organised nucleus, .g. bacterial cell, while the cells of some other organisms have a well-organised nucleus.
· Amongst organisms with nucleated cells, some are unicellular and others are multicellular.
· Among multicellular organisms also, some organisms can manufacture their own food (photosynthesis) while others cannot.
Which of the following are the basic characteristics of an organism | |||
| Right Option : C | |||
| View Explanation |
____________________ is the basic unit of life in all organisms. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct ? (a) Evolution is the process by which new types of organisms are developed from the pre-existing ones through modification. (b) The cell is the basic unit of life in all organisms. | |||
| Right Option : C | |||
| View Explanation | |||
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