Life Processes Living Being are normally considered beings who show signs of life like breathing, walking etc like Humans, animals etc, in case of plants growth/greenery of the plant is cri teria to consider it as alive. plant that is not visibly growing is still alive, and some animals can breathe without visible movement. So using visible movement as the defining characteristic of life is not enough. Cells are the smallest functional and structural unit of our body. They are the sub units of tissues. They perform the function of growth,metabolism,protein synthesis,etc . Group of cells constitute tissues. Metabolism is a term that is used to describe all chemical reactions involved in maintaining the living state of the cells and the organism . It can be divided into 2 processes, 1. catabolic – the breaking down of compounds (for example, the breaking down of glucose to pyruvate by cell ular respiration ); or anabolic – the...