Stabilizing selection - Study guides, Class notes & Summaries

Requirements for Hardy-Weinberg equilibrium - ️️1. No mutations 2. Large population so random chance does not cause allele frequency changes 3. No migration in or out of the population 4. Random mating happens 5. No phenotypic advantage is present Analogous structures - ️️Parts that have the same function, but developed from different lineages Genetic bottleneck - ️️Losing genetic or phenotypic diversity due to genetic drift Gene flow - ️️Movement of new alleles from one ...

3 Paths leading to the recognition of human evolution 1. Explaining the variation in life forms 2. Recognizing the antiquity of the planet 3. Recognizing the antiquity of humanity The difference between natural and artificial selection natural selection does not have a long term goal. it is an invisible hand Darwin's 5 theories of evolution 1. Species Change 2. All organisms have common ancestry 3. Evolution is gradual 4.Evolution leads to speciation 5. Evolution occurs through natural ...

Experiment - Answer-test of a hypothesis. It can be observational (observe the system) or manipulative (perturb the system). The experimental method is the scientific method. Hypothesis - Answer-universal proposition that suggests explanations for some observed ecological situation. Model - Answer-verbal or mathematical statement of a hypothesis. Principle - Answer-universal statement that we all accept because they are mostly definitions, or are ecological translations of physical-chemic...

BIO 182 Exam 2 Questions And Answers 100% How many modes of selection are there? 3 What are the modes of selection? Stabilizing selection, directional selection, and disruptive selection Stabilizing Selection The mean of the trait remains similar over time but the standard deviation decreases Directional Selection The mean phenotype shifts in a particular direction Disruptive Selection The standard deviation of the trait increases as individuals with the mean value disappear. Stabil...

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, o...

Which of the following is not an observation or inference on which natural selection is based? a. There is heritable variation among individuals. b. Poorly adapted individuals never produce offspring. c. Species produce more offspring than the environment can support. d. Individuals whose characteristics are best suited to the environment generally leave more offspring than those whose characteristics are less well suited. e. Only a fraction of an individual's offspring may survive. - b. P...

bio 1108 exam 1 (herrick) questions and answers 100% pass what are two factors that contribute to phenotype? - Correct Answer ️️ -genotype and environment species - Correct Answer ️️ -individuals that are able to exchange genetic material gene pool - Correct Answer ️️ -all alleles present in individuals of that species populations - Correct Answer ️️ -interbreeding groups of organisms of the same species living in the same geographical area what are two main sources that l...

Ecology Science Olympiad Exam Questions And Answers Succession - answerprogressive replacement of one community by another until a stable climax is established 2 types of succession - answerPrimary: succession of vegetation from a barren desert or water to a climax community Secondary: Biotic communities develop in a place where the natural vegetation is gone but soil is present Climax Community - answercommunity of vegetation (plants, trees, fungi, etc) that have reached a steady state...

UCLA Anthro 1 Midterm 1 Exam Questions And Answers All Correct Natural Selection - ANS Evolution by variation and selective retention Morphology - ANS an organism's size, shape, and composition Stabilizing Selection - ANS Selection required to change a population and then keep it the same for future generations species - ANS dynamic population of individuals individual selection - ANS adaptation results from the competition among individuals continuous - ANS ...

DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that - humans and chimpanzees share a relatively recent common ancestor If the half-life of carbon-14 is about 5730 years, then a fossil that has one-quarter the normal proportion of carbon-14 to carbon-12 should be about how many years old? - 11,460 The giraffe stretched its neck while reaching for higher leaves; its offspring inherited l...