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Unit 2 Review A barnacle on the belly of a whale is an example of _______________ Population size of a parasite is closely related to the population of its ________ What is the difference between autotrophs and heterotrophs? What is this called? When the population of an organism reaches a point where death = births Which area (shape) represents the fundamental niche? A retreating glacier leaves a clear, clean body of water. What process will eventually occur? A flower and a bee have what type of relationship? What is the first organism to colonize newly exposed rock? An increase in predator population will most likely cause a __________ in the prey population. What does a biomass pyramid show? Two species living closely together is called _________. A community that will not go through any further succession is called a ________ ________ An organism that is actively hunted by another could be considered a _______________ In primary succession, no life lichen grass shrubs _________ deciduous trees. All consumers must eat either plants or animals in order to provide themselves with ____________. The situation that will occur when two organisms have the same fundamental and realized niche. What is the difference between generalized species and a specialized species? What affect does the removal of the keystone predator have on population density? Hurricane Katrina is an example of what type of limiting factor? Give an example of convergent evolution. A symbiotic relationship in which both organism benefits is called _____________ Give an example of a parasitic relationship. All natural ecosystems are said to be ____________. What two things determine the type of land biome in a given area? What theory suggests that ecosystems may be very sensitive to even small changes and that can cause drastic results? What term is defined as a layer in the structure of feeding relationships in an ecosystem? In an ecosystem, what consumes the top carnivore? In a numbers pyramid, which trophic level is the largest? What percentage of energy in one trophic level appears in the next? Where does all the energy in an ecosystem initially come from? Plants that have nitrogen-fixing bacteria in their roots are called _____________. ___________ is the evaporation of water from the leaves of plants. ___________ is the increasing concentration of a pollutant in organisms at higher trophic levels in a food web. Give an example of coevolution. Primary consumers are always on the __________ trophic level.