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Regeneration - Root and Shoot Morphogenesis
Higher plants have three kinds of regenerative activities;
All plants possess inherent ability to regenerate lost parts. For example when a part of mature tissues are removed from stem, the exposed mature cells undergo differentiation, division and re-differentiation to restore the normal pattern. When a branch is cut and wound is made-damaged tissues are cast off and new cells take this place. A wound also results in the formation of a zone of cells that form a thick protective layer. Induction of hormones like auxins and cytokinins that promote cell division is also a reaction to wound and part and parcel of regeneration. Mobilization of nutrients towards the site of injury, synthesis of new hormones, increased cell division and thickening of cell walls etc. are some of the responses and contribute to regeneration.
JOINTS - The structural arrangement of tissues which connect 2 or more bones together at their place of meeting is called a joint. Study of joint is arthrology. Joint make the
Explain the Competitive behaviour of social animal group dominance behaviours removal of individuals to other groups which minimises inbreeding eg lions, apes.
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Which are the characteristics and organs of the digestive system of earthworms related to the type of diet of these animals? Earthworms eat decomposing organic material and sma
Advantages and disadvantages of protozoa
Autogamy - Patterns of Sexual Reproduction It is known to take place in many ciliate protozoans including Paramecium. Autogamy involves same nuclear behavior like in conjugati
Why Iron is required as a part of haemoglobin? As a part of haemoglobin, iron is required for the transport of oxygen, to all cells in the body. Thus, haemoglobin is critical f
The clinical manifestations of IE result from the local destructive effects of intracardiac infection; the embolization of bland or septic fragments of vegetations to
Explain the energy flow of ecology? Energy flow: As you can see, energy flow is one way in an ecosystem. Energy is not recycled. The ultimate source of energy that powers eco
Q. What are risk factors for diseases? The Risk factors for a disease are everything that contributes to increase the risk of the disease to appear. For example, for most cardi
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