characteristics of living things
DESCRIPTION
A PPT file to describe some characteristics of the living organisms.TRANSCRIPT
Characteristics of living things
Organization
Organisms exhibit a high level of organization
Bacteria protozoan Microalgae jelly fish
Homeostasis
It is the maintenance of a dynamic internal environment in terms of temperature, pH, water concentrations, etc.
Energy acquisition and release
Organisms obtain energy from sunlight, inorganic chemicals, or another organism, and release it in the cellular respiration process.
Modes of nutritionWays of obtaining and using nutrients
Nutrition
Autotrophic nutrition
Heterotrophic nutrition
Holozoic nutrition
Saprophytic nutrition
Parasitic nutrition
Autotrophic nutrition
Organisms make their own food (complex organic substances) using simple inorganic substancesAutotrophs
by photosynthesis
Heterotrophic nutritionOrganisms which depend
on other organisms or
dead organic matters as
their food sources
Heterotrophs
Cannot make their own
food and obtain their
food in organic form
Holozoic nutrition
Organisms take in solid organic food from other organisms
Food needs to be broken down into small molecules before they can be used by the organismsHeterotrophs
Animals taking holozoic nutritionHerbivores
Feed on plants only
Animals taking holozoic nutritionCarnivores
Feed on animals only
Animals taking holozoic nutritionOmnivores
Feed on both plants and animals
Saprophytic nutrition (Saprophytism)
Organisms feed on dead organisms or non-living organic matter
They are called saprophytes (fungi, bacteria, etc.)Decomposers: Important to recycle organic matter
Parasitic nutrition (Parasitism)Organisms (parasite) obtain organic
compounds from another living organism of a different species (host)Parasite is benefitedHost is harmed
Growth and development
Even single-celled organisms grow until they develop into mature cells. Multicellular organisms pass through a more complicated process of differentiation and organogenesis.
Reproduction and heredityAll cells come from existing cells. Therefore, they must have some way of reproducing, whether that involves asexual or sexual strategies. Genetic information will pass from one generation to the next one
Detection and response to stimuli
Interactions
Adaptation
Living things are suited to their mode of existence.
Charles Darwin
EvolutionChange in the inherited characteristics of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organization (species, individuals and molecules, such as DNA and proteins).