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Origin and Evolution of Life - Points to Remember | 10th Science : Chapter 19 : Origin and Evolution of Life

Chapter: 10th Science : Chapter 19 : Origin and Evolution of Life

Points to Remember

Lamarck proposed that the acquired characters are passed on to the offsprings in the next generation.

Origin and Evolution of Life

Points to Remember

·                 Lamarck proposed that the acquired characters are passed on to the offsprings in the next generation

·          Internal vital force, environment and new needs, use and disuse theory and inheritance of acquired characters are the main principles of Lamarckism.

·                 Overproduction, struggle for existence, variations, survival of the fittest or Natural

·                 selection and origin of species are the main postulates of Darwinism.

·                 Each species tends to produce large number of offsprings, but only the fittest can survive.

·                 Homologous, analogous organs and

·                 embryological evidences explain evolutionary relationships.

·                 Some traits in organisms would be similar because they are inherited from a common ancestor.

·                 Fossils are evidences of ancient life forms or ancient habitats which have been preserved by natural processes.

·                 Ethnobotanical importance of various types of plants are know through traditional knowledge.

·                 Astrobiology/exobiology is the science which looks for the presence of extra terrestrial life in the universe




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