Cells are the smallest unit of life and the building blocks for all organisms. Each component of a cell has its own function. Animal and plant cells differ and they have similarities. Nucleus ...

Most animal cells possess a nucleus, cell membrane, cytoplasm and mitochondria. The nucleus contains the genetic material (DNA) of the organism and controls the cell’s activities. The cell ...

The (a) intestine, (b) esophagus and (c) stomach are shown. Quiescent stem cells (d) through asymmetric division probably give rise to more rapidly dividing active stem cells, which then produce ...