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Mr. Biando's Lab
Life Sci PSSA Glossary
| Term | Definition |
|---|---|
| allele | Any of a set of possible forms of genes |
| biochemical conversion | The changing of organic matter into other chemical forms |
| biological diversity | The variety and complexity of species present and interacting in an ecosystem and the relative abundance of each. |
| biomass conversion | The changing of organic matter that has been produced by photosynthesis into useful liquid, gas or fuel. |
| biomedical technology | The application of health care theories to develop methods, products and tools to maintain or improve homeostasis. |
| biotechnology | The ways that humans apply biological concepts to produced products and provide services |
| dichotomous | A community of living organisms and their interrelated physical and chemical environment |
| embryology | The branch of biology dealing with the development of living things from fertilized egg to its developed state |
| enzyme | A protein that increases the rate of a chemical reaction without being changed by the reaction; an organic catalyst. |
| evolution | A process of change that explains why what we see today is different from what existed in the past; it includes changes in the galxies, stars, solar system, earth and life on earth. Biological evolution is a change in hereditary characteristics of groups |
| extinction | The complete elimination of a species from the earth |
| homeostasis | The tendency for a system to remain in a state of equilibrium by resisting change |
| intergrated pest management | A variety of pest control methods that include repairs, traps, bait, poison, etc. to eliminate pests |
| lentic | Relating to or living in still water |
| lotic | Relating to or living in actively moving water |
| mitosis | The sequential differentiation and segregation of replicated chromosomes in a cell's nucleus that precedes complete cell division |
| theory of evolution | A theory that the various types of animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modification in successive generations |
| trophic levels | The role of an organism in nutrient and energy flow within an ecosystem (herbivore, carnivore, decomposer) |
| herbivore | an organism that eats plants |
| decomposer | an organism that obtains nutrients by eating dead organic matter, thereby making nutrients accessible to other organisms. |
| consumer | organisms that obtain energy by feeding on other organism and their remains |
| environment | The total surroundings of a plant or animal including other plants or animals, climate and location. |
| mitigation | The policy of constructing or creating man made habitats, such as wetlands, to replace those lost to development |
| niche | The role played by an organism in an environment. |
| pest | A label applied to an organism when it is in competition with humans for the same resorce |
| stream order | Energy and nutrient flow that increases as water moves towards the oceans (from small stream to river to ocean) |
| succession | The series of changes that occur in an ecosystem with the passing of time |
| sustainability | The ability to keep in existence or maintain. |
| waste stream | The flow of waste materials from generation, collection and separation to disposal. |
| watershed | The land area from which surface runoff drains into a stream, channel, lake, reservoir or other body of water. |
| wetlands | lands where water saturation is the dominate factor determining the nature of the soil development and the plant and animal communities |