2 - Biology Diversity PDF

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Biology Diversity...

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Which of the following lists of assumptions was part of Charles Darwin's theory of natural selection? A) 1. Earth and its life are very old. 2. Populations produce more offspring than their environment can support. 3. Organisms vary in heritable ways. 4. Mutation rates were higher in the past than they are now. B) 1. Populations produce more offspring than their environment can support, so individual organisms must compete for limited resources. 2. Some traits improve the survival and reproduction of individuals who possess them. 3. There is little genetic variability. 4. Organisms vary in heritable ways. C) 1. Organisms vary in heritable ways. 2. Populations produce more offspring than their environment can support, so individual organisms must compete for limited resources. 3. Some traits improve the survival and reproduction of individuals who possess them. 4. Mutations directly cause the changes in species. D) 1. Organisms vary in heritable ways. 2. Some traits improve the survival and reproduction of individuals who possess them. 3. Populations produce more offspring than their environment can support, so individual organisms must compete for limited resources. 4. Earth and its life are very old. D Genetic Variation from Sexual Recombination Which of these individuals is a homozygous genotype? a. Aa b. AG c. aG d. Gg e. AA e. AA All the genes in a population are that population's _____. A. genotype B. phenotype C. gene pool D. fitness E. Hardy-Weinberg C. gene pool Genetic drift is a process based on _____. A. immigration B. emigration C. mutation D. the role of chance E. differential reproductive success correlated to the relationship between a phenotype and the environment D. the role of chance A mutation occurs when _____. A. population sizes are small B. individuals enter a population C. individuals leave a population

D. there is a change in the DNA sequence of a gene E. some individuals leave more offspring than other individuals D Suppose that every few years, all people over 6 feet tall do not have any children. How will this affect the human population? A. Genetic drift will play less of a role in the evolution of humans. B. It will increase in number since shorter people use fewer resources than taller people. C. Alleles that promote "tallness" will decrease in frequency. D. Gene flow will increase. E. The mutation rate will increase. C Modern travel along with migration reduces the probability of _____ having an effect on the evolution of humans. A. genetic drift B. mutation C. natural selection D. gene flow E. disease A. genetic drift The ease with which humans travel across the globe is likely to increase _____. A. mutation B. natural selection C. gene flow D. genetic drift E. all of these C. gene flow Homologous pairs of chromosomes are lined up independently of other such pairs during _____. A. metaphase II B. anaphase I C. metaphase I D. prophase II E. telophase II C. metaphase I...