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 |
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 | |||
Which of the following are correct ? (a) Classification is the arrangement of organisms into a series of group based on physiological, biochemical, anatomical or other relationships. (b) In an organism chromosome is the basic unit of life in all organisms. (c) Evolutionary relationships are traced in the classification of organisms. | |||
| Right Option : C | |||
| View Explanation | |||
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