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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.
Digestive system of human
Fracture - It is a break of a bone. Bone fracture are of many types - (i) Green stick fracture - It is merely a crack, the bone remains partly intact. (ii ) Sim
fish liver oil is rich in which vitamin ???
How does the sexual arousal mechanism in women facilitate fecundation? During sexual arousal in women the vagina secretes substances to neutralize its acidity therefore allowin
ECOLOGY
Q. What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers? Gastrulation is the process through which a portion of the bl
Electrophoresis is the technique of separating the large molecules (for instance DNA fragments or proteins) from the mixture of identical molecules. An electric current is passed
how trematodes/nematodes adapt to their parasitic mode of feeding
Q. Percentage ratio of ash in honey? Standards allow ash content in honey up to 0.5 per cent, but the ash of genuine honey seldom exceeds 0.35 per cent. It is determined by cha
What is Non specific defence Non specifi c: These relate to the physical barriers like skin and mucous membrane. They form the first line of defence against entry of mic
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