Biology Unit 5 Ecology and Evolution (flashcards) 3.0 / 5 based on 1 rating ? BiologyDNA, genetics and evolutionInternational BaccalaureateNone Created by: Tanya PhillipsCreated on: 11-04-13 04:38 Define species group of organisms that can interbreed and produce fertile offspring 1 of 22 Define habitat environment in which a species normally lives or the natural location of a living organism 2 of 22 Define population group of organisms of the same species who live in the same area at the same time 3 of 22 Define community group of populations living and interacting with each other in an area 4 of 22 Define ecosystem community and it's abiotic environment 5 of 22 Define ecology study of relationships between living organisms and their environment 6 of 22 Define autotroph organism that synthesises its organic molecules from simple inorganic substances 7 of 22 Define heterotroph organism that obtains organic molecules from other organisms 8 of 22 Define consumer organism that ingests other organic matter that is living or has recently died 9 of 22 Define detritivore organisms that ingests dead organic matter 10 of 22 Define saptrotrophs organisms that live in dead organic matter and secrete digestive enzymes into it and absorb the products of digestions 11 of 22 Define trophic level position of organism in a food chain 12 of 22 What is the initial energy source for almost all communities? Light 13 of 22 Why are energy transformations never 100% efficient? Energy is lost through heat and waste 14 of 22 What recycles nutrients? Saprotrophic bacteria and fungi 15 of 22 Define decomposer organisms that obtain their energy from dead organisms 16 of 22 Define evolution it is the cumulative change in the heritable characteristics of a population 17 of 22 First process required for evolution to take place... a source of variation between individuals of one species 18 of 22 Second process required for evolution to take place... change in the frequency of the genes in the gene pool of a population 19 of 22 Finish the sentence: Populations produce more offspring.. than the environment can support 20 of 22 Why do members of a species show variation? Through independent assortment and crossing over in meiosis 21 of 22 What is the binomial system of nomenclature? every species has a latin name made up of two parts: name of the genus, name of the species. ie Homo sapiens. 22 of 22
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