Part of CBSE Class 9 Science on Lipi
About this chapter
Cell: The Building Block of Life · CBSE Class 9 Science. Cell Theory Basics: All living organisms are composed of one or more cells, which serve as the fundamental structural and functional units of life derived from pre-existing cells.
From this free lesson
Summary
Most scientists agree that life first appeared in water, though not necessarily the wide open ocean. Some researchers now think it more likely began in small, changeable pools rather than the sea, and hot springs offer a working model of what those pools might have been like.
Central idea
Every cell is a fully staffed factory: a control centre with the master blueprint, power plants generating energy, manufacturing lines building proteins, packaging and shipping departments, a clean-up crew, and storage tanks - all sealed inside a wall that decides exactly what gets in and out.
Finished the Cell foundation lesson?
Continue with CBSE Class 10
Unlock the available Class 10 Science, Maths, English and Hindi chapters with one monthly class subscription.
Unlock CBSE Class 10 →