Define Reproduction .
The process by which old organism gives birth to a new organism.
Biology
What are the functions of Phloem tissue in plants ?
Functions of Phloem are :- Phloem helps in the transportation of organic food to all the parts of a plant. Phloem parenchyma helps in lateral conduction and the storage of food. Phloem fibres are used by man for making ropes and rough cloths.
Name different elements of Phloem tissue ?
Sieve tubes Companion cells Phloem Parenchyma Phloem Fibers
Name different elements of Xylem tissue ?
Tracheids Vessels or Tracheae Xylem or Wood Parenchyma Xylem Sclernchyma or Wood Fibres
What are the factors affecting the rate of transpiration ?
Sunlight Temperature Humidity Air movements
What is deplasmolysis ?
Swelling of a plasmolysed cell to retain its original volume when placed in pure water. This happens due to endosmosis .
What is Plasmolysis ?
Shrinkage of protoplasm of a cell from its wall due to the loss of water by exosmosis when plays in the concentrated solution.
What is Exosmosis ?
Withdrawal of water/solvent molecules from a cell into an external concentrated solution.
What is Endosmosis ?
In flow of water/solvent molecules from an external dilute solution into a cell.