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krodriguezScience7
Topic 10 Vocabulary
| Term | Definition |
|---|---|
| organism | a living thing |
| cell | the basic unit of structure and function in living things |
| unicellular | made of a single cell |
| multicellular | consisting of many cells |
| stimulus | any change or signal in the environment that can make an organism react in some way |
| response | an action or change in behavior that occurs as a result of a stimulus |
| spontaneous generation | the mistaken idea that living things arise from nonliving sources |
| homeostasis | the condition in which an organism's internal environment is kept stable in spite of changes in the external environment |
| species | a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce |
| classification | the process of grouping things based on their similarities |
| genus | a taxonomic category that names a group of similar, closely related organisms |
| binomial nomenclature | the classification system in which each organism is given a unique, two part scientific name indicating its genus and species |
| taxonomy | the scientific study of how living things are classified |
| domain | the most basic level of organization in the classification of organisms |
| evolution | change over time; the process by which modern organisms have descended from ancient organisms. |
| convergent evolution | the process by which unrelated organisms evolve similar characteristics |
| virus | a tiny, nonliving particle that enters and then reproduces inside a living cell |
| host | an organism that provides a source of energy or a suitable environment for a parasite to live with, in or on |
| vaccine | a substance used in a vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens |
| bacteria | single celled organisms that lack a nucleus; prokaryotes |
| protist | a eukaryotic organism that cannot be classified as an animal, plant or fungus |
| parasite | an organism that benefits by living with, on, or in a host in a parasitism interaction |
| tissue | a group of similar cells that perform a specific function |
| vascular plants | a plant that has true vascular tissue for transporting materials |
| nonvascular plants | a low growing plant that lacks true vascular tissue for transporting materials |
| vertebrates | an animal with a backbone |
| invertebrates | an animal without a backbone |
| organ | a body structure that is composed of different kinds of tissues that work together |
| mammals | a vertebrate whose body temperature is regulated by its internal heat and that has skin covered with hair or fur and glands that produce milk to feed its young. |
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krodriguez24
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