what does it takes to be a living organ? Assignment Please answer the following DB Focus your discussion on the following Make comparisons between living things and nonliving things that have some of the characteristics that define life Compare the following pairs and explain what the differences are using the 8 criteria A rock to a snail A rock to a tree A dog to a TV Explain why electricity is sometimes called live or discuss some of the characteristics fire shares with living things (it can grow, it metabolizes, and so on) Solution Characteristics Living Things Non Living Things Shape and Size They possess definite shape and sixe No definite shape and size Cellular structure They consists of cells They have no cells Organisation Have a definite organisation. There are tissues, organs, organ systems which work as an integrated unit No organisation Growth They show growth No growth Movement They show movement or locomotion No movement Nutrition Need food for energy Need no food Respiration All living organism respire.In order to obtain energy, glucose is combine with oxygen in cells. Need no respiration Excretion Excrete unwanted materials from the body Do not show excretion Metabolism Anabolic and catabolic reactions takes place. No metabolic changes takes place Response Show response to stimuli Show no response to stimuli Reproduction Reproduce young ones of their own kind Show no reproduction Differentiation Show differentiation during development No process of differentiation takes place Adaptations Living things show adaptations to changing environmental conditions for better survival Do not show any adaptations Life span Living things have some life span. They have no life span Death Living beings will die after certain period of life. Death doesn’t exsist in these things. They are broken down or destroyed by external forces Examples Human, birds, tree etc. Car, pen, chair etc 2. Eight criteria of life are: i) These all above criteria present into snail but absent in rock. ii) These above eight criteria present in tree but absent in rock. iii) These above criteria present in dog but absent in TV. 3. Electricity is sometimes called live because it uses a shock that can go through our whole body and shock us. For example: 1. Reflex arc. 2. An electrical signal always generate from our heart and maintains our blood circulation. Characteristics Living Things Non Living Things Shape and Size They possess definite shape and sixe No definite shape and size Cellular structure They consists of cells They have no cells Organisation Have a definite organisation. There are tissues, organs, organ systems which work as an integrated unit No organisation Growth They show growth No growth Movement They show movement or locomotion No movement Nutrition Need food for energy Need no food Respiration All living organism respire.In order to obtain energy, glucose is combine with oxygen in cells. Need no respiration Excretion Excrete unwanted materials from.