The Living World

 

 What is Living? Characteristics of living organisms: • Growth • Reproduction, Self-replication and self-organization • Res...

Characteristics of life • According to one definition, living organisms are open systems that maintain homeostasis, are co...

GROWTH • Increase in mass and /or number of individuals or cells. • Increase in mass and number are twin characteristics i...

• Growth in unicellular organisms: - Also by Cell Division - Cell Division is also a method of reproduction in them, thus,...

• Difference of growth in non-living objects and living organisms: - In both increase in mass occurs. - In non-living obje...

REPRODUCTION • It is the ability to produce new individual organisms of same kind. • Non-living things do not have the pro...

- In yeast and hydra, budding is a method of reproduction.

- In Planaria (flatworm), fragmentation is a method of asexual reproduction. This is referred as regeneration.

- The fungi, filamentous algae, the protonema of mosses, all easily multiply by fragmentation.

- In bacteria and amoeba, binary fission is a method of reproduction. - In Euglena and Paramecium also asexual reproductio...

- Sexual reproduction is commonly observed in higher plants and animals. - It involves formation of gametes by two parents...

METABOLISM • All living organisms are made of big or small chemicals of various types, which exhibit different functions. ...

CELLULAR ORGANIZATION • All living organisms are made of CELLS. • A cell is the smallest basic unit of life, which can per...

CONSCIOUSNESS • It is the ability to sense their surroundings or environment and respond to these environmental stimuli (p...

THUS - Living organisms are self-replicating, evolving and self-regulating interactive systems capable of responding to ex...

DIVERSITY IN THE LIVING WORLD • Biodiversity refers to the number and variety of organisms (plants, animals, fungi, protis...


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