ICSE Class 10 Biology — Flashcards for Quick Revision

A: A cell is the structural and functional unit of all living organisms, except viruses, protozoa, Euglena, and bacteria. All important life activities such as respiration, nutrition, and excretion are c

A: A cell is called the basic unit of life because all metabolic activities are performed by cells. It is the smallest living unit that can carry out essential life processes and build up the body of a l

A: The cell wall is the outermost boundary of a plant cell. It is non-living, freely permeable, and mainly made of cellulose. It gives shape, rigidity, and protection to the cell.

A: Cell division is necessary because growth increases cell size and disturbs the normal ratio between cytoplasm and nucleus, as well as the surface area to volume ratio. Division restores balance, helps

A: The cell cycle is the period from the end of one division of a cell to the end of the next division. It includes interphase and the division phase.

A: The cell cycle is divided into two main phases: interphase and division phase or M-phase. Interphase is the growth period, while M-phase is the division phase.

A: Heredity is the inheritance of species and parental characteristics from one generation to the next. It explains why young ones resemble their parents and members of the same species share common feat

A: Variations are differences in characteristics among individuals of the same species. They may be acquired or somatogenic, caused by environmental factors, or blastogenic, caused by inheritance of slig

A: Genetics is the branch of biology that deals with the mechanism of heredity and variations. It studies how traits are passed on and why individuals differ from one another.