What is an organ system?
(a) Give two examples of organ systems in animals.
(b) Name the two main organ systems in plants.
A group of interconnected organs which works together to do a big job for the organism, is called an organ system.
(a) Various organ systems of animals (including human beings) are Digestive system, Respiratory system, Circulatory system, Nervous system etc.
(b) The plants have two main organ systems : Root system and shoot system.
A, B, C and D are basic parts of all the cells. The part A contains thread like structures called E which transfer the characteristics from parents to their offsprings into the cell and out of the cell. The part B provides energy to the cell. The part C is found in plant cell but not in animal cell. The part D is a transparent, jelley–like material. What could A, B, C, D and E be?
Why is the plasma membrane called a selectively permeable membrane?
In the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?
Explain various types of organisms on the basis of number of cells.
