Terms : Hide Images
| 5031182800 | Heterotroph | Organism that obtains its energy from the food it consumes |  | 0 |
| 5031182801 | Autotroph | Organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds. |  | 1 |
| 5031182802 | Greenhouse Effect | Carbon dioxide and water vapor in atmosphere trap infrared radiation, re-reflecting it back toward earth. |  | 2 |
| 5031182803 | Eutrophication | Sewage and fertilizer runoff adds nutrients to lakes; phytoplankton decreases and cyanobacteria increases. |  | 3 |
| 5031182804 | Symbiosis | A close and often long-term interaction between two or more different species |  | 4 |
| 5031182805 | Mutualism | Symbiotic relationship in which both species benefit from the relationship. |  | 5 |
| 5031182806 | Commensalism | Symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed. |  | 6 |
| 5031182807 | Parasitism | Symbiotic relationship in which one organism lives in or on another organism, called the host, and consequently harms it. | 7 | |
| 5031182808 | Population Density | Number of individuals per unit area. |  | 8 |
| 5031182810 | Species Richness | The number of different species in a community. |  | 9 |
| 5031182811 | Species Diversity | The number and relative abundance of species in a community. |  | 10 |
| 5031182812 | Exponential Growth | Growth of a population in an ideal, unlimited environment, represented by a J-shaped curve. |  | 11 |
| 5031182813 | Logistical Growth | Growth pattern in which a population's growth rate slows or stops following a period of exponential growth, forming an S-shaped curve. |  | 12 |
| 5031182814 | Carrying Capacity (K) | Maximum population of a particular species that a given habitat can support over a given period. |  | 13 |
| 5031182815 | Limiting Factors | Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms. |  | 14 |
| 5031182816 | Density-Dependent Limiting Factor | A limiting factor of a population wherein large, dense populations are more strongly affected than small, less crowded ones. |  | 15 |
| 5031182817 | Density-Independent Limiting Factor | Limiting factor that affects all populations in similar ways, regardless of population size. |  | 16 |
| 5031182818 | r-selection | Also called density-independent selection. Characterized by many offspring with little or no parental care. |  | 17 |
| 5031182819 | k-selection | Also called density-dependent selection. Characterized by few offspring with little or much parental care. |  | 18 |
| 5031182820 | Type I Survivorship | Usually experience high survival in early and middle life, followed by a rapid decline in later life. Usually K-selected |  | 19 |
| 5031182821 | Type II Survivorship | Experience roughly a constant mortality rate regardless of age. Prey animals such as birds can follow this pattern of survival. |  | 20 |
| 5031182822 | Type III Survivorship | Experience the greatest mortality early on in life, with relatively low rates of death for those surviving. Usually r-selected. |  | 21 |
| 5031182823 | Age Distribution | A model used in population geography that describes the ages and number of males and females within a given population. |  | 22 |
| 5031182824 | Keystone Species | A plant or animal that plays a unique and crucial role in the way an ecosystem functions. |  | 23 |
| 5031182825 | Consumer | A heterotroph |  | 24 |
| 5031182826 | Producer | An autotroph |  | 25 |
| 5031182827 | Circadian Rhythm | The 24-hour biological cycles found in humans and many other species. |  | 26 |
| 5031182832 | Taxis | Movement in response to a stimulus |  | 27 |
| 5031182833 | Innate Behavior | A non-learned response that fixed in an organism upon birth. |  | 28 |
| 5031182834 | Aposematic Coloration | The bright coloration of animals with effective physical or chemical defenses that acts as a warning to predators. |  | 29 |
| 5031182835 | Biotic | Living | 30 | |
| 5031182836 | Abiotic | Non-living | 31 | |
| 5031182837 | Batesian Mimicry | A type of mimicry in which a harmless species looks like a species that is poisonous or otherwise harmful to predators. |  | 32 |
| 5031182838 | Mullerian Mimicry | A type of mimicry in which two or more unpalatable species resemble each other. |  | 33 |
| 5031182839 | Habitat Fragmentation | Breakup of a habitat into smaller pieces, usually as a result of human activities. | 34 | |
| 5031182840 | Indigenous | Native to a certain area. | 35 | |
| 5031182841 | Invasive Species | Species introduced to new areas that often disrupt the indigenous communities. | 36 | |
| 5031182842 | Ectoparasite | Parasites that feed on the external surface of a host. | 37 | |
| 5031182843 | Endoparasite | Parasites that live within the body of their host. | 38 | |
| 5031182844 | Biological Magnification | The increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain. | 39 |
