Directional selection - Study guides, Class notes & Summaries

BIO 101 NVCC FINAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH VERIFIED ANSWERS |ALREADY GRADED A+ What is an adaptation? A.a genetic change over time B.an increase in reproductive success by certain individuals C.a trait that is heritable and confers reproductive success D.differential reproductive success of a particular individual E. B & D Correct Answer C.a trait that is heritable and confers reproductive success In a population of dogs, long ears are dominant over short...

A thin-shelled crab can more readily move to escape a predator than can a thick-shelled crab, but it is more vulnerable to predators that drill through the shell. Because of these opposing forces, shell thickness for many types of crabs has remained within a narrow range over a long time. This would be an example of _____________________________ selection correct answer: stabilizing What is genetic change in a population over time? correct answer: evolution What is the mode of 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...

A ___ is a community along with its physical environment. Ecosystem By definition, a _____ consists of individuals of the same species that are living in the same area at the same time. Population Parasitic relationships fall under the category of _____. Consumption If two species of birds are interacting, and both are experiencing a negative effect on fitness, which type of interaction is occurring? Competition ____ is defined as any change in allele frequency in a population that is due to...

AQA A Level Psychology: Research Methods Exam Questions and Answers 100% Correct A general statement on what the researcher intends to investigate - Answer-What is an Aim? A clear, precise, testable statement that states the Relationship between the Variables to be investigated - Answer-What is a Hypothesis? A hypothesis that states the direction of the outcome of the experiment - Answer-What is a Directional Hypothesis? A hypothesis that doesn't state the direction of the outcome of t...

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...

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...

Allele - Gene for particular trait (T) (t) artificial selection - selective breeding of plants and animals to promote the occurrence of desirable traits in offspring Base pairing in DNA - Adenine, Thymine, Guanine, Cytosine Base pairing in RNA - Adenine, Uracil, Guanine, Cytosine Basic monomers and polymers of nucleic acids - bottleneck effect - A change in allele frequency following a dramatic reduction in the size of a population Central Dogma - DNA-transcription-RNA-translation-protei...

Biology 1108 Unit 1 EXAM Questions and Answers 100% Pass The term "n" refers to the size of a population, that is, the number of individuals in that population. In general, in a sample of n individuals, the frequency of an allele is: A)the number of occurrences of the allele. B)the number of occurrences of the allele divided by n. C)the actual value of n D)the number of occurrences of the allele divided by twice the number of individuals in the sample (2n). E)twice the number of occur...

AP Bio Evolution Latest Update Already Graded A adaptive radiation rapid speciation of a single or a few species to fill many ecological niches allopatric speciation when populations physically separated by an extrinsic barrier evolve so that if the barrier breaks down, they can't breed artificial selection the intentional breeding of certain characteristics over others balanced polymorphism natural selection maintaining polymorphisms in a population bottleneck effect an evol...