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Science 8- obj: 2
Life Science
Question | Answer |
---|---|
Life is organized in the manner | atoms molecules cells tissues organs organ systemsorganismpopulationscommunitiesecosystems |
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 |