Reproduction :- Ability to produce new organism is known as reproduction. There are two types of reproduction-asexual reproduction and sexual reproduction. Different types of Reproduction There are mainly two types of reproduction- asexual reproduction and sexual reproduction. Asexual Reproduction It is a mode of reproduction involving single parent. There are different modes of asexual reproduction- Fission:- It is the process of splitting of cell into two or more different cells. It can be categorised into two ways. Binary fission and Multiple Fission. Binary fission is defined as the splitting of the organisms into two equal halves and each half give rise to a new organism. For example, Amoeba , Paramisium, Hydra, Yeast, etc. The most common type of fission in binary fission. Fig.1. Binary fission in Amoeba Multiple Fission If a cell splits into number of cells called as multiple fission. Fragmentation is another mode...
Control and Coordination Systematic working of the various organs of an organism (plants or animals) producing a proper response to the stimulus is called co-ordination. Coordination in Plants Not so elaborate, controlled by phytohormones and external stimulus. Phytohormones • Control and coordination in plants is done by phytohormones. • They are naturally occurring chemical substances which control one or other aspect of growth. • Auxin – Cell enlargement and differentiation. • Gibberellins – In presence of auxin, promotes cell enlargement and differentiation. • Cytokinins – Promotes cell division, opening of stomata, etc. • Abscisic acid – Closing of stomata, wilting and falling of leaves, etc. Tropic Movements • Directional plant growth movement in response to an external stimulus. • Growth of a plant may be towards the stimulus (positive tro...
Life processes • Constantly exhibit the functions of maintenance and repair in living organisms • Some Examples- Digestion, Respiration, Circulation etc. Nutrition • Process of obtaining nutrients from the environment i.e. intake of food and then its digestion in the body. • Two types – Autotrophic (self-sufficient for food) and Heterotrophic (dependent on others for food). Autotrophic nutrition • Synthesis of food by photosynthesis- ‘photo’ means light and ‘synthesis’ means production. It is the production of food with the help of sunlight. • Photosynthesis equation- 6CO 2 +6H 2 O give C 6 H 12 O 6 +6O 2 • Events of photosynthesis are as ...
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