BSC1005 Biodiversity Exam Questions And Answers Rated A+ New Update Assured Satisfaction

World Event taking place due to negative human impact on biodiversity - Going into the world's 6th mass extinction event. current extinction rates are between 10 and 100 times higher than those estimated from the fossil record Vast Number in species of life - There are between 1.5 and 2 million named species of living things on earth. Plants-300,000 Fungi-100,000 Bacteria and Protista-100,000 Vertebrates-50,000 Insects- 950,000 Ecosystem Services - Something such as oxygen, fresh water, or food that is provided by an ecosystem by its species Developmental Diversity - Differences in cells within the body Genetic Biodiversity - Differences in genes Geographical Biodiversity - Differences in life between geographical regions Species - A population or group of populations of organisms that are very similar to one another(share a recent evolutionary history) Important components of species - The ability to interbreed Lennean system of classification - Binomial names(two names) Genus Species - ex. Homo sapiens(humans)... homo is the genus name and sapiens is the species Species Richness - The number of species occurring in a particular areaSpecies Diversity - combination of number of species and relative number of individuals of each species Diversity of species throughout the world - Species are NOT spread evenly throughout the world, ex. tropical areas typically have more species than temperate ones Ecosystems - Combination of both biotic and abiotic factors Biodiversity - The variety of life, and can refer to: habitat, species and genetic diversity, etc.. Genomics - The new use of the comparative method Genome - entire set of genetic material in a cell Allele - particular version of a gene Source of Genetic variation - individuals having different alleles Human Impact on biodiversity - Is negative due to human interactions such as pollution, agriculture, etc Populational thinking - -Is a way of looking at the world. Views people, animals, bacteria, cities,etc. as being parts of a population of similar things -Individuals are being influenced by many factors so it can be hard to say the cause of something is Typologically - assigns different things to categoriesEvolution - based on the variation with natural selection being the primary mechanism of evolution. characteristics that help organisms surviveand reproduce will become prevalent in that environment. Three that must take place for evolution to occur - -competition(more born than survive) -inheritance(pass traits to offspring) -variation(individuals all have different traits) Charles Darwin - Traveled to the galapagos. This where came up with the idea of evolution/ Darwin's two main ideas - -descent with modification -natural selection Evidence of evolution - -Life on islands -Homology -Fossil Record Alfred Wallace - Learned about biodiversity by traveling through the Amazon and Southeast Asia Stabilizing selection - genetic diversity decreases as the population stabilizes on a particular trait value Distruptive selection - Population tend to diverge into two different groups Directional selection - common in response to change in environment Reproductive Isolation - Allows for independent evolution