Ucsb EEMB 2: MIDTERM 1 EXAM QUESTIONS & ANSWERS RATED 100% CORRECT!!

Age structure - Answer-Distribution of individuals across age categories Alfred Russel Wallace - Answer-Established biogeography Amenalism - Answer-One species is harmed, other is unaffected Antagonistic interactions - Answer-One species benefits, other is harmed (e.g., predation, herbivory, parasitism) Any environment is made up of its ________________ and ________________ components. - AnswerBiotic and abiotic Aposematism - Answer-'Warning' coloration Are abiotic factors generally density-dependent or -independent? - Answer-Density-independent Are geographical barriers common in nature? - Answer-Yes Are most organisms highly mobile? - Answer-Yes Are most organisms very efficient? - Answer-No Are species in a community closely linked? - Answer-Yes Are there many good examples of clear predator-prey cycles in natural populations? - Answer-No At what temperatures are most organisms viable? - Answer-0˚C - 45˚CBatesian mimicry - Answer-Benign species closely resembles a toxic one Biogeographic regions - Answer-Continent-scale areas with characteristic assemblages of species occupying many different biomes; separated by climatic, topographic, and/or aquatic barriers to dispersal of organisms, creating strikingly different biotas Biogeography - Answer-The scientific study of patterns of distribution of species, populations, and ecological communities Biological control - Answer-Use of natural environment to reduce population density of an economically damaging species Biomass - Answer-Dry weight (measure of carbon) Biome - Answer-An environment shaped by its climate and its geographic attributes, characterized by ecologically similar organisms; distribution based on climatic conditions Biotic potential - Answer-rN ; usually limited by environment Bottom - up effects - Answer-The abundance of higher trophic levels depends on factors such as nutrients and prey availability from lower trophic levels Can large scale distribution patterns be used to predict climate conditions? Can they be used to predict what species will occur? - Answer-Yes, no; large scale distribution patterns can be used to predict climate conditions but not what species will occur Can populations ever grow at their intrinsic growth rate (rMax)? - Answer-Yes, for very short periods of time Carrying capacity - Answer-K, # of individuals an environment can supportClimate - Answer-Average atmospheric conditions and the extent of their variation over a long time Clumped dispersion pattern - Answer-Presence of 1 individual at any point increases probability of others being near that point Coastal zone - Answer-Shoreline to continental shelf (shallow water level); lots of plankton; stable temperature, high oxygen; coral reefs + kelp forests