The Chatactaristics Of Life Flashcards
Life is defined by possessing all of the following:
Sensitivity
Nutrition
Organisation
Reproduction
Excretion
Definition: Sensitivity
Response to stimulus (taste, touch, sight, sound)
Definition: Nutrition
The way organisms obtain and use food
Autotrophs: Can make their own food by photosynthesis (Eg:) Plants
Heterotrophs: Cannot make their own food, they eat plants or animals (Eg:) Humans
Definition: Heterotrophs
Heterotrophs: Cannot make their own food, they eat plants or animals (Eg:) Humans
Definition: Autotrophs
Autotrophs can make their own food by photosynthesis (Eg:) Plants
Definition: Organisation
Means that all living things are composed of cells, tissues, organs, organ systems
Example in Humans:
Cell: Stomach cell
Tissue: Lining of the stomach
Organ: Stomach
Organ system: Digestive system
Organism: Human
Definition: Reproduction
The production of new individuals
Asexual
Sexual
Definition: Excretion
The removal of waste products of metabolism
Metabolism: The sum of all chemical reactions in the body
(Anabolic and Catabolic)
Respiration: Release of energy from food
Definition: Metabolism
The sum of all chemical reactions in an organism
Definition: Respiration
Respiration: Release of energy from food
Definition: Anabolic Reaction
These reactions use energy to join small molecules together to form larger molecules
(Eg:) Photosynthesis
Definition: Catabolic Reaction
These reactions use energy to break down large molecules into smaller ones (Eg:) Respiration
C R A P
C - Catabolic
R - Respiration
A - Anabolic
P - Photosynthesis
Definition: Continuity of life
The ability of an organism to exist from one generation to the next
Necessary for The Continuity of life
Reproduction and Hereditary (genes/DNA) to achieve continuity
All characteristics of life
