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Charc. Of life

Characteristics of life

what is biology the study of living things
what is an organism a living thing. Small organisms=micro-organisms
what must an organism have to be living? the 5 characteristics of life
the 5 characteristics of life organisation/nutrition/excretion/response/reproduction
organisation means that all organisms consist of a structure that improves efficiency. e.g. cell->tissue->organ system
definition of cell smallest unit of a living thing that has all 5 characteristics of life e.g. muscle cell
definition of tissue a group of similar cells with the same function e.g. muscle tissue
definition of organ a group of different tissues with a specialised function e.g. the heart
definition of organ system is a group of organs working together to carry out a function e.g. Circulatory system
nutrition the ways an organism obtains and uses its food
2 types of nutrition autotrophic and heterotropic
autotrophic nutrition organisms that make their own food
heterotrophic nutrition organisms
Excretion the removal of waste products of metabolism from the body
metabolism is the sum of all the chemical reactions in the cell
Response the ability to detect change in the surroundings and then to respond adequately
Reproduction making more individuals of the same species (fusion of egg and sperm)
Created by: amykavanaghh