Biology > QUESTIONS & ANSWERS > PBIO Final Exam (All)
PBIO Final Exam The total area on earth where living things are found, the sum total of all its ecosystems - ✔✔Biosphere A portion of the biosphere characterized by a distinct climate and a par ... ticular assemblage of plants and animals adapted to it - ✔✔Biome A specific portion of a biome consisting of the living (biotic) and non-living (abiotic) environmental components that interact - ✔✔Ecosystem All of the populations living and interacting in an area - ✔✔Community A group of individuals of the same species living and interacting in the same region - ✔✔Population Order of their hierarchical organization - ✔✔Biosphere, biome, ecosystem, community, population Where a particular organism or population interacts with the physical environment - ✔✔Habitat The role the organism plays in the ecosystem - ✔✔Niche Of a region, the genetic diversity within its species, variety of species, and variety of ecosystems - ✔✔Biodiversity Three levels of biodiversity - ✔✔Genetic, species, and ecosystem Why preserve biodiversity at the ecosystem levels? - ✔✔Habitat for other organisms, services people need and enjoy Why preserve biodiversity at the genetic levels? - ✔✔Response to variation in environment, survival and reproduction of a population, resources for human needs Why preserve biodiversity at the species level? - ✔✔Resources for human needs, keeps ecosystem in balance, more stable with environmental stresses What did they lose on Easter Island when the palm trees were gone? - ✔✔Material sources, soil, species diversity, oxygen, and clean water Evidence that there were palm forests on Easter island - ✔✔Nut castings and charcoal remains, pollen was buried in sediment in the 2 crater lakes over thousands of years, ancient texts, and root channels [Show More]
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