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Enviro. 5

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Ecosystem diversity   the variety of ecosystems within a given region.  
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Species Diversity   How many species are there?  
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Genetic Diversity   different assortment of genes  
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Species richness   the number of species in a given area  
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Species evenness   the measure of whether a particular ecosystem is numerically dominated by one species or are all represented by similar numbers of individuals; i.e., the distribution.  
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Evolution   how the genetic composition of a species changes over time.  
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Microevolution   evolution below the species level  
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Macroevolution   Evolution that gives rise to new species or larger groups, such as new genera, family, class, or phyla.  
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Genes   physical locations on chromosomes within each cell of an organism; the genetic code.  
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Genotype   the complete set of genes in an individual. All the genes within an organism are also collectively called the genome.  
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Phenotype   the set of traits actually physically or biochemically expressed in an individual.  
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Mutation   a random change in the genetic code. Can add variation  
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Evolution by artificial selection   when humans determine which individuals breed. (For example, the more than 400 modern breeds of dogs or 800 breeds of domestic cattle.) Or through unintended consequences, such as weed killers and antibiotics.  
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Evolution by natural selection   the environment determines which individuals are most likely to survive and reproduce.  
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Darwin's theory of evolution by natural selection   Individuals produce an excess of offspring.Not all can survive.Individuals differ in traits.Differences in traits can be passed on from parents to offspring.Differences in traits are associated with differences in the ability to survive and reproduce.  
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Point one of Darwin's Theory of Evolution   Individuals vary  
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Point two of Darwin's theory of evolution   some of this variation is inherited  
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Point three of Darwin's theory of evolution   Some inherited variation confers advantages on the individual such as making them faster, stronger, smarter, or otherwise better adapted to survive.  
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Point four of Darwin's Theory of evolution   Those individuals who are better adapted to the environment are more likely to survive and reproduce, passing on their inherited advantage.  
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Point five of Darwin's Theory of Evolution   Individuals who successfully reproduce transmit forms of their specific genes to the next generation, and offspring will benefit from the advantage offered by the genes. Over generations, these genes will become much more frequently found in the species.  
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Genetic Drift   change in the genetic composition of a population over time as a result of random mating.  
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Bottleneck Effect   a reduction in the genetic diversity of a population caused by a reduction in number of organisms.  
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Founder Effect   a change in a population descended from a small number of colonizing individuals.  
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Allopatric speciation   new species are created by geographic or reproductive isolation.  
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Symmetric speciation   volution of one species into two species in the absence of geographic isolation, usually through polyploidy  
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Polyploidy   which is an increase in the number of sets of chromosomes.  
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The rate at which a species evolves   1. The rate of environmental change (its “niche”). 2. The amount of genetic variation in the species. 3. The size of the population involved. 4. How fast the species reproduces (generation time).  
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Realized niche   the range of abiotic and biotic conditions under which a species lives. This determines the species distribution, or areas of the world where it lives  
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Niche generalist   species that can live under a wide range of conditions.  
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Niche specialist   species that live only in specific habitats.  
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