write a short note on (100words)
A - stem cells
B - nanotechnology
Answers
Answer:
A. stem cells
Stem cells are cells with the potential to develop into many different types of cells in the body. They serve as a repair system for the body. There are two main types of stem cells: embryonic stem cells and adult stem cells.
Stem cells are different from other cells in the body in three ways:
They can divide and renew themselves over a long time
They are unspecialized, so they cannot do specific functions in the body
They have the potential to become specialized cells, such as muscle cells, blood cells, and brain cells
B. nanotechnology
Nanotechnology is a field of research and innovation concerned with building 'things' - generally, materials and devices - on the scale of atoms and molecules. A nanometre is one-billionth of a metre: ten times the diameter of a hydrogen atom. The diameter of a human hair is, on average, 80,000 nanometres