characteristics of life. vocabulary : make flash cards respiration aerobic anaerobic ...
Post on 16-Jan-2016
Embed Size (px)
Characteristics of Life
Vocabulary : Make Flash Cards RespirationAerobicAnaerobicCells MetabolismSynthesisHomeostasisOrganicInorganicAutotrophHeterotroph
Opening Activity = Set up your flashcard fronts for these 11 vocabulary words.
Do the definitions on the back, for homework
DefinitionsRespiration: Getting energy from food.Aerobic: Using oxygen.Anaerobic: Lacking oxygen.Cells: Living matter enclosed by a barrier. The basic unit of life.
More DefinitionsMetabolism: Chemical reactions that break down or build up materials to support life.Synthesis: Making complex molecules from less complex molecules.Homeostasis: Keeping internal and external conditions balanced. (Thermostat on a furnace Shivering produces heat)
Organic or Inorganic?Organic means that something has the element carbon in it. Living things have carbon and so they are considered organic.Inorganic: Nonliving things, generally lack carbon and are considered inorganic. The one exception is carbon dioxide it is inorganic and contains carbon
Autotroph and HeterotrophAutotrophs produce their own food.Heterotrophs ingest their food.
These methods both provide an organism with the necessary nutrients to live.Assimilation: is how these nutrients become part of the organism.
8 Characteristics of Life1. Made of One or More Cells2. Reproduce3. Based on Genetic Code (DNA)4. Grow and Develop5. Obtain and Use Nutrients and Energy6. Respond to Environment7. Maintain Stable Internal Environment8. Evolve or Change Over Time
1. Made of One or More Cells
A cell is a living unit enclosed by a barrier called a membrane
Unicellular = 1 cell
Multicellular= More than one cell
Some cells are specialized and have specific jobs.
Cells can grow, reproduce and respond to environment
1. Made of One or More Cells
a.) CELL: Collection of living material enclosed within a barrier b.) cells are basic unit of life c.) Unicellular: made up of one cell d.) Multicellular: made up of many cellsUnicellularMulticellular
Sexual cells from 2 different parents unite to form the first cell of the new organismAsexual One parent can divide or bud to form two organisms that are identical
Reproduction = produce offspring which resemble parentsa.) asexual reproduction: has only one parent b.) sexual reproduction: requires two parentsAsexualSexual
3. Based on Genetic CodeInherited traits are carried by DNA deoxyribonucleic acidAsexual reproduction provides one set of traits Sexual reproduction combines the traits of 2 parents
4. Grow and DevelopGrowth Increase in size. Multicellular and unicellular organisms growDevelop Changes in shape and structureLifespan How long an organism livesLife Cycle Staged of development
4. Grow and Develop a.) GROWTH: increase in size & shape b.) DEVELOPMENT: mature over time c.) living things have a lifespanGrowthDevelopment
5. Obtain and Use Nutrients and EnergyChemical reactions called metabolism require energyAll organisms take in materials to provide the energySunlight provides energy for producers or autotrophsFood provides the energy for consumers or heterotrophs
5. Living Things Use & Need Energy a.) energy comes from food, used to maintain body b.) AUTOTROPH: produce own food c.) HETEROTROPH: must consume food d.) DECOMPOSER: breaks down dead material for food
6. Respond to Environment
Responds to a stimulus or signal External =light, temperature, gravityInternal = Blood sugar, CO
6. Respond to their Environment a.) React to a stimulusb.) An action causes a reactionc. ) A reaction is called a responsed.) This involves one individual
7. Maintain Stable Internal EnvironmentHomeostasis- keeping internal conditions balanced to surviveExamples: temperature and water How? Feedback mechanisms, like a thermostat on a furnace
7. Living things maintain a stable internal environment a.) HOMEOSTASIS: internal balance b.) examples: sweating, panting, shivering, etc.
8. Evolve and Change Over TimeIndividuals may experience many changes in their life span but their basic traits are the same.As a group a species will change over time and the general traits will be different.
8. Evolve and change over time a.) adapt to long-range changes in environmentb.) change to better survive in environmentc.) these changes take place over a long period of time & involve the entire species
Quiz 2: The following are all examples of the characteristics of life. Identify each one.Adapt D. genetic code G. Respond to stimulusMade of cells E. Grow and develop H. Homeostasis Reproduce F. Use/need energyYou eat a hamburger for lunch.A baby gains 3 pounds in one week and begins to recognize voices.A polar bear has white fur to blend in with the snow.Your start to cry whenever you get a shot at the doctors office.You begin to shiver because it is cold outside.Red and white particles make up part of your blood.A chick breaks out of an egg.
Levels of OrganizationIndividualPopulationCommunityEcosystemBiome
IndividualThe same species can breed and have fertile offspring
PopulationMany of the same species living in a specific place
CommunityThe popuations of living organisms that are found in specific area
EcosystemsThe Biotic and Abiotic factors found in a given area
BiomeA group of ecosystems within a certain climate containing specific dominant species.
Biology is the study of_____
Biology is the study of_____The living world.
Is photosynthesis required to be considered a living thing?
Is photosynthesis required to be considered a living thing?NO
Specialized cells allow cells to____________
Specialized cells allow cells to____________Perform different functions
What is Homeostasis?
What is Homeostasis?Homeostasis is the process of keeping internal conditions stable.
Name two things that are stimuli.
Name two things that are stimuli.LightTemperature
What is metabolism?
What is metabolism?Chemical processes in your body like building up or breaking down nutrients
Describe two ways organisms might respond to environment.
Describe ways organisms might respond to environment.Shivering in the coldBirds fly southPupils constrict when exposed to lightCells shrink when exposed to salt waterTrees drop their leaves in the autumn
To be in a community you must live_______
To be in a community you must live_______You must live in the same area.You cannot be located on the other side of the river or in a distant part of the forest.
How would you know if something were a living organism?
How would you know if something were a living organism?Made of One or More CellsReproduceBased on Genetic Code (DNA)Grow and DevelopObtain and Use Nutrients and EnergyRespond to EnvironmentMaintain Stable Internal EnvironmentEvolve or Change Over Time