B2- Understanding our Environment 0.0 / 5 ? ScienceBiologyGCSEOCR Created by: el_bCreated on: 18-02-14 18:26 What is the order of classification? Kingdom --> Phylum --> Class --> Order --> Family --> Genus --> Species 1 of 27 What are natural classification systems? Natural classification systems are based on the evolutionary relationships and genetic similarities between organisms 2 of 27 What are artificial classification systems? Artificial calssification systems are based on appearance rather than genes 3 of 27 What does the term species mean? a species is a group of organisms which can interbreed to produce fertile offspring 4 of 27 What is Asexual reproduction asexual reproduction is where an organism reproduces by making a copy of itself. 5 of 27 What is a hybrid? if you interbreed a male from one species with a female from another species you'll get a hybrid 6 of 27 what is a pyramid of number? a pyramid of number shows the amount of living organisms at that trophic level 7 of 27 what is a pyramid of biomass? a pyramid of biomass shows the dry weight of the organisms, it shows the total mass of living material 8 of 27 what are the ways animals lose energy? (MRS GREN) movement, respiration, sensitivity, growth, reproduction, excretion, nutrition 9 of 27 Can excretory products be the start of a food chain? yes, faeces can be the starting point of other food chains, DECAY 10 of 27 Carbon cycle: the oceans absorb CO2, acting as what? Carbon sinks 11 of 27 Carbon cycle: marine organisms have ____ made of calcium ____ 1.) shells 2.) carbonate 12 of 27 overtime, shells in the carbon cycle become.... limestone 13 of 27 Carbon cycle: CO2 returns to the air during ____ eruptions or ____ 1.) volcanic 2.) weathering 14 of 27 what is nitrogen an essential component for? amino acids and proteins 15 of 27 what is the job of saprophytic bacteria? begin decomposition of dead animals and plants into ammonia 16 of 27 what is the job of nitryfing bacteria? converts ammonia into soluable nitrates the plants can absorb using the process of nitrification 17 of 27 What is the job of denitryfing bacteria? release nitrogen back into the atmosphere under anaerobic conditions, very deep in the soil 18 of 27 what is the job of nitrogen fixing bacteria? converts nitrogen from air and use it to make their own proteins 19 of 27 what is lightning? in thunder storms electrical energy combines nitrogen and oxygen to form oxides, these dissolve in the rain and form nitrates in the soil 20 of 27 what is a population in biology? a population is the number of individuals of the same species living in a certain habitat 21 of 27 what is a community? a community includes all the different species living in a certain area 22 of 27 what is meant by the term interspecific? different species competing with each other 23 of 27 what is meant by the term intraspecific? the same species competing with each other 24 of 27 what is a ecological niche? the position of an organism or population in an ecosystem 25 of 27 what do plants compete for? light for photosynethesis, water/minerals and space 26 of 27 what do animals compete for? a mate, food and shelter 27 of 27
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