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Science 8- obj: 2

Life Science

Life is organized in the manner atoms molecules cells tissues organs organ systemsorganismpopulationscommunitiesecosystems
Structure is the way something is put together and function is the job that the structure performs. These two concepts are interrelated
Unicellular organisms carry out all of the functions necessary for the organism to stay alive within a single cell.
Multicellular organisms are composed of many specialized cells that work together to help the organism survive
Autotrophs (producers) are organisms that can make their own food, they are also known as producers
Heterotrophs(consumers) cannot make their own food so they must eat other organisms, they are known as consumers.
Homeostasis is the attempt of the body or a cell to maintain a constant internal environment
feedback mechanism is a response of an organism to a given change.
The function of the cell membrane is to control what substances come into and out of the cell
cell wall outside the cell membrane whose function is to shape and support the cell.
The nucleus of a cell directs all of the cell's activities
DNA is the genetic material of the cell and it is found in the nucleus.
Mitochondria are organelles that produce most of the energy the cell needs to carry out its functions.
Endoplasmic reticulum (ER) is an organelle that carries proteins and other materials from one part of the cell to another.
Ribosomes are organelles that produce proteins inside of a cell.
Chloroplast is an organelle found only in plant cells that captures energy from sunlight and uses it to produce food for the cell
Vacuole is an organelle that is a storage area of the cell.
prokaryotes Bacteria cells are called ______ because they do not have a nucleus.
Eukaryotes are cells that contain a nucleus
heredity. The process by which traits are passed on from parent to offspring
Asexual reproduction is a reproductive process that involves only one parent and in this process the offspring is identical to the parent
photosynthesis During ________ cells capture energy from sunlight and use to produce food
CO2 + H2O  C6H12O6 + O2 is the equation for photosynthesis
respiration, During respiration, cells break down glucose to produce energy that is needed to function
adaptations Many animal body structures are _____that help the animal to survive in its habitat.
invertebrate is an animal without a backbone
vertebrate is an animal with a backbone
ecosystem. All of the living and nonliving things that interact in a particular area
biotic factors The living parts of an ecosystem
abiotic factors. nonliving parts of an ecosystem
habitat things an organism needs to live, grow, and reproduce
population. All the members of one species in a particular area
community. All the different populations that live together in an area
limiting factor environmental factor that prevents a population from increasing
Decomposers obtain energy by breaking down waste and the remains of dead organisms.
Food chains show the flow of energy from organism to organism. In general energy flows from producers to consumers to decomposers in an ecosystem
Food chains show the flow of energy from organism to organism. In general energy flows from producers to consumers to decomposers in an ecosystem
primary consumer is an organism that consumes producers
secondary consumer is an organism that feeds on primary consumers
tertiary consumer is an organism that feeds on secondary consumers
Created by: HBend