In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: AdaptationAnswer: a structure, behaviour, or physiological that helps an organism survive and reproduce in a particular environment Question: Adaptive Answer: the diversification of a common ancestral species into a variety of adapted species Question: speciationAnswer: speciation in which a population is split into two or more isolated groups by a geographical ; also called geographical speciation Question: structureAnswer: structures of organisms that do not have a common evolutionary origin but perform similar Question: Artificial Answer: selective pressure exerted by on populations in order to improve or modify particular desirable traits Question: Answer: the study of the past and present geographical of species populations Question: Answer: the use of technology and organisms to produce useful Question: Bottleneck Answer: changes in gene that result from a rapid decrease in population size Question: Answer: the idea that catastrophes such as floods, diseases, and droughts periodically destroyed species living in a particular region, allowing species from neighbouring regions to repopulate the Question: evolutionAnswer: a pattern of evolution in which similar traits arise because different species have independently adapted to similar conditions Question: Descent with Answer: Darwin’s theory that natural selection does not demonstrate , but merely results from a species’ ability to survive local conditions at a specific time Question: selectionAnswer: natural selection that favours the phenotypes at one extreme over , resulting in the distribution curve of phenotypes shifting in the direction of that extreme Question: Disruptive (diversifying) Answer: natural selection that favours the extremes of a range of phenotypes than intermediate phenotypes; this type of selection can result in the elimination of intermediate phenotypes Question: Divergent Answer: a pattern of in which species that were once similar to an ancestral species diverge, or become increasingly distinct Question: Ecological Answer: the ecological role and physical distribution of a species in its Question: EmbryologyAnswer: the study of early, pre-birth of an organism’s development Question: EvolutionAnswer: the process of genetic change in a population over Question: ExtinctAnswer: describes a species that has disappeared from Earth Question: FitnessAnswer: the ability of an organism to viable offspring capable of surviving to the next generation Question: recordAnswer: the remains and of past life that are found in sedimentary rock; it reveals the history of life on Earth and the kinds of organisms that were alive in the past Question: Founder Answer: a change in a gene pool that occurs when a few individuals start a new population Question: Gene Answer: the net movement of alleles from one population to another due to the migration of Question: Genetic Answer: the change in frequencies of alleles due to events in a breeding population Question: GradualismAnswer: a model of that views evolutionary change as slow and steady, before and after a divergence Question: Homologous Answer: structures that have similar structural elements and origin but may have a function Question: Inheritance of acquired Answer: the idea that characteristics during an organism’s lifetime can be passed on to its offspring Question: MimicryAnswer: a structural in which a harmless species resembles a harmful species in coloration or structure Question: MonocultureAnswer: the agricultural practice of planting large of uniform varieties of the same species. Question: MutationAnswer: a permanent change in the genetic material of an ; the only source of new genetic variation Question: Natural Answer: the process by which characteristics of a change over many generations as organisms with heritable traits survive and reproduce, passing their traits to offspring Question: Non-random Answer: mating among individuals on the basis of mate for a particular phenotype or due to inbreeding Question: PaleontologyAnswer: the study of ancient life through the of fossils Question: Post-zygotic mechanismAnswer: a barrier that prevents hybrid zygotes from into viable, fertile individuals; also called post-fertilization barrier Question: Pre-zygotic isolating Answer: a barrier that either mating between species or prevents fertilization of the eggs if individuals from different species attempt to mate; also called pre-fertilization barrier Question: equilibriumAnswer: a model of evolution that views evolutionary history as long periods of stasis, or equilibrium, that are by periods of divergence Question: advantageAnswer: a genetic advantage that an organism’s chance of survival, usually in a changing environment Question: pressureAnswer: environmental conditions that select for certain characteristics of individuals and against other characteristics Question: Sexual Answer: natural selection for mating , in general, on competition between males and choices made by females Question: SpeciationAnswer: the formation of new species from existing Question: selectionAnswer: natural selection that favours intermediate and acts against extreme variants Question: Survival of the Answer: the idea that the organisms that are the fittest leave the most offspring, so those organisms win the for survival; phrase coined by John Spencer Question: speciationAnswer: speciation in which populations the same geographical areas diverge and become reproductively isolated Question: TheoryAnswer: in science a theory is a set of principles that explain and phenomena. All theories in science are based on an immense amount of observed evidence Question: Theory of by natural selectionAnswer: a theory explaining how life has changed, and to change, during Earth’s history Question: fossilAnswer: a fossil that shows intermediary links between groups of organisms and shares characteristics to two now separate groups Question: Answer: Lyell’s theory (based on Hutton’s theory) that geological processes operated at the same rates in the past as they do today Question: Answer: differences between individuals, which may be structural, , or physiological Question: Vestigial Answer: a structure that is a reduced version of a that was functional in the organism’s ancestors |
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