Organizing Life. 7 Characteristics of Life 1)Living things are organized (Hierarchy of levels)...
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Transcript of Organizing Life. 7 Characteristics of Life 1)Living things are organized (Hierarchy of levels)...
Organizing Life
7 Characteristics of Life1) Living things are organized (Hierarchy of levels)- Cell: Smallest unit of life- Tissue: A group of cells that perform a specific
function- Organ: Several tissues joined together- Organ systems: Organs that work together to
perform a body function
7 characteristics of life
2) Living things acquire materials and energy- Outside sources of energy and building
materials are needed for an organism to maintain its organizations.
Energy: the capacity to do workMaterials: Molecules that make up the parts of
the cell come from the food we eat
7 Characteristics of life
3) Living things reproduce- Life comes from life- Genes are sections of DNA that code for certain
traits. These genes allow organisms to make more of themselves.
- DNA contains two groups of information: Structures & Metabolism (chemical reactions)
7 Characteristics of Life4) Living things respond to
stimuli- Usually in the form of
movementEg. 1 Predator move
towards prey = reacting to sight of prey.
Prey = Stimulus
Eg. 2 Plants move towards the sunlight = reacting to light.
Light = Stimulus
7 Characteristics of Life
5) Living things are homeostatic- Homeo = similar Static = stationary- The internal environment of the living thing is
constantEg. Body temperature, Rate of Digestion Heart rate at rest, Breathing
7 characteristics of life6) Living things grow and developGrowth: Increase in the number or size of cellsDevelop: The changes that take place from
conception to death
7 Characteristics of Life7) Living things can adapt to their environmentSpecies: Group of individuals capable of
interbreedingAdaptation: Trait that makes an animal better
suited to its environment
- Environments are constantly changing.- After a change in the environment the better
suited individuals of a species will survive and reproduce. This will lead to a change in the species = adapt
7 Characteristics of LifeEg. Grasslands- Early herbivores favoured leafy plants because
they were easy to digest.- As the grass completely took over the
individuals who could not digest it starved and those who could survived and reproduced
Organization of SpeciesSystematics: The act of identifying species then
classifying them according to a set of rules.
Each species is placed in the following groups:DomainKingdomPhylumClassOrderFamilyGenus Species
Eg. Bearded Dragon
Domains
Domain: Three groups used to divide all known species. These groups are based on the structure of the cell.
Three Domains:1) Bacteria: Unicellular prokaryotic organisms2) Archaea: Unicellular prokaryotic organisms
related to eukaryotes3) Eukarya: Uni or multicellular organisms made of eukaryotic cells
Classification of Organisms
Classification of Organisms
Classification of Organisms
Kingdom: ProtistaKingdom Organization Type of
NutritionExamples of the Kingdom
ProtistaComplex Single celled organism
AbrosptionIngestion
Photosynthesisamoeba
Kingdom: FungiKingdom Organization Type of
NutritionExamples of the Kingdom
FungiMulticellular filamentous
organism with complex cells
Absorption mushrooms
Kingdom: PlantaeKingdom Organization Type of
NutritionExamples of the Kingdom
PlantaeComplex
multicellular organism
Photosynthesis All Plants
Kingdom: AnimaliaKingdom Organization Type of
NutritionExamples of the Kingdom
AnimaliaMulticellular
organism IngestionFish, Reptiles,
birds, mammals,
Binomial NomenclatureBinomial Nomenclature: A name given to an
species in Latin. Consists of two parts1) First name = Name of the genus First letter is Capitalized2) Second name = Name of Species
Eg Gray Wolf. Genus = Canis Species = Lupus Binomial nomenclature = Canis lupus
Assignment