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Biology- Chap. 3
Vocabulary
| Question | Answer |
|---|---|
| The scientific study of interactions among organisms and between organisms and their environment, or surroundings. | Ecology |
| The largest of nature's houses. Contains the combined portions of the planet in which life exists, including land, water, and air. | Biosphere |
| A group of organisms so similar to one another that they can breed and produce fertile offspring. | Species |
| Groups of individuals that belong to the same species and live in the same area. | Population |
| Assemblages of different populations that live together in a defined area. | Community |
| A group of ecosystems that have the same and climate and similar dominant communities. | Biome |
| Plants, some algae, and bacteria that can capture energy from sunlight or chemicals and use that energy to fuel the assembly of simple inorganic compounds into complex organic molecules. | Autotrophs, Producers |
| The process in which some autotrophs harness solar energy. | Photosynthesis |
| When organisms use chemical energy to produce carbohydrates. | Chemosynthesis |
| Organisms that rely on other organisms for their energy and food supply. | Heterotrophs, Consumers |
| Consumers that eat only plants. | Herbivores |
| Consumers that eat only animals. | Carnivores |
| Consumers that eat both plants and animals. | Omnivores |
| Consumers that feed on another organisms remains and other dead matter. | Detritivores |
| Consumers that break down organic matter. | Decomposers |
| A series of steps in which organisms transfer energy by eating and being eaten. | Food chain |
| Network of complex interactions formed by the feeding of various organisms in an ecosystem. | Food web |
| Each step or level in a food chain or food web. | Trophic level |
| A diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web. | Ecological pyramid |
| The total amount of living tissue within a given trophic level. | Biomass |
| Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another. | Biogeochemical cycle |
| The process by which water changes from liquid to an atmospheric gas. | Evaporation |
| The process in which water enters the atmosphere by evaporating from leaves of plants. | Transpiration |
| All the chemical substances that an organism needs to sustain life. | Nutrients |
| The process of converting nitrogen gas into ammonia. | Nitrogen fixation |
| Conversion of nitrates into nitrogen gas. | Denitrification |
| The rate at which organic matter is created by producers. | Primary productivity |
| Single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem. | Limiting nutrient |
| An immediate increase in he amount of algae and other producers that results from a large input of a limiting nutrient. | Algal bloom |