| A | B |
|---|
| herd animals are usually foudn in the ___ | grassland |
| the great northern coniferous forests are part of the | taiga |
| __is a major limiting factor of the tundra biome | temperature |
| Phytopankton, which obtain energy by photosynthesis, are usually found concentrated in the | photic zone |
| A __ is usually the stable result of succession | climax community |
| __ factors restrict the number of organisms that can exist | limiting |
| Age, physical condition, and stage in its life cycle may all influence an organisms | limits of tolerance |
| the range of factors under which an organism functions and survives is known as | tolerance |
| The __ is a region dominated by deciduous trees | temperate or deciduous forest |
| A large group of ecosystems characterized by the same types of climax commuity in called a | biome |
| the colonization of new sites by communitites of organisms is | primary sucession |
| a ___ is a stable, mature community that undergoes little or no succession | climax community |
| conditions that restrict the existence, population size, reproductive success, or distribution of organisms are called | limiting factors |
| the portion of shoreline that is affected by high and low tides is the | photic zone |
| __ is the replacement of one community by another as environmental condititons change | succession |
| A body of water near the coast that is partly surrounded by land and contains both fresh and salt water is know as | estuary |
| __ is a layer of soil that remains frozen throughout the year | permafrost |
| Microscopic organisms that float in the sunlit regions of the ocean are | plankton |
| the __ is an arid region characterized by little or no plant life | desert |
| water is lost to the abiotic parts of the biosphere from the biotic parts by the process of | transpiration |
| nitrogen is released to the abiotic parts of the biosphere from the processes of | death and decay of bacteria |
| Carbon dioxide in the atmosphere enters the biotic parts of the biophere though | photosynthesis |
| cougars are predators that often eat weakened or diseases animals. The is a descripiton of the __ of cougars | niche |
| An ecologists who studies how severl species in an area interact among each other and with the abiotic parts of the environment is interested in the level of organiztion __ | ecosystem |
| An ecologists who studies how several species in an area interact is interested in the biological organization called a | community |
| As matter and energy move up a energy pyramid the amount of available energy __ | decreases |
| Cats and mice are a __ | predator-prey relationship |
| coyotes would be considered a | third-order consumer |
| An uncut lawn becoming a forest is | secondary successsion |
