Biology Flashcards
Bios
Life
Logos
knowledge
What is biology ?
the study of life
What distinguishes a living organisms from a non-living object?
Living organsisms must be able to carry out metabolism which ensures the continuity of life
Metabolism
the sum of all the chemical reactions in an organism
what controls the rate of all reactions
enzymes
2 types of reactions
anabolic reactions (anabolism) catabolic reactions (catabolism)
plant anabolism
photosynthesis
animal anabolism
protein synthesis
Photosynthesis equation
6CO2 + 6H2O –sunlight and chlorophyll–> C6H12O6 + 6O2
Continuity of life
Living organism arise form other living organisms of same species
Characteristics of life definition
The characteristics necessary to allow for metabolism and continuity of life
6 characteristics of life
Organisation Nutrition Respiration Excretion Response (sensitivity) Replace
uincellular
consist of one cell eg.Amoeba
multicellular
consist of many cells
Nutrition
the way an organism obtains and uses food
Autotrophic
organisms that make their own food using simple molecules and sunlight eg. plants
Heterophic
organisms that cannot make food and must use food made by other organisms eg.animals, fungi
Respiration
the release of energy by breaking down food molecules
Excretion
the removal of waste products of metabolism from the body
Response (Sensitivity)
Responding to changes in the environment (stimuli)
