Biology 102 Stakes Test 5 – Flashcards
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Which of the following is more fit
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A 500 year old bristlecone pine tree that produced 100 offspring every year
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All of the following are true of evolution except
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Individuals adapt their genes to improve survival
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Which is necessary for natural selection to proceed
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All of the above
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Natural selection causes
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Changes in Allele frequencies within a population
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All of the following are true of natural selection except
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It works best in genetically uniformed populations
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Natural selection that favors survival of extreme phenotypes of a population is called:
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Diversifying selection
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When extreme phenotypes are selected against and disappear, which pattern of natural selection is at work?
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Stabilizing selection
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Allele frequencies of a population can change by
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All of the above
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The biological species concept defines a species as
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Members of a population that interbreed and produce fertile offspring
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Frog species mate at different times of the year. This is an example of which type of reproductive isolation?
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Temporal isolation
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Reproductive isolation based on location or geography is referred to as:
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Ecological isolation
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Pollen from a tomato plant lands on grapefruit flower. The pollen fails grow a pollen tube. This is an example of:
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Gametic isolation
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Which of the following can influence the evolutions of a species?
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All of the above
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Which of the following best points to a close evolutionary relationship between two different species?
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Both species have very similar DNA
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The proportion of alleles present in a gene pool is called the ________ and is an important tool in measuring evolutionary changes.
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Allele frequency
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In a population of 100 mice, if the recessive allele frequency is 0.25 how many copies of the recessive alleles are found in the population?
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50
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Which of the following does not influence allele frequencies in a population?
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All of the above influence allele frequencies in a population
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Inbreeding can lead to a decrease in genetic diversity and _____
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Inbreeding Depression
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Which of the following is not an example of adaptive evolution ?
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All choices are non adaptive
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You examine a population and note that it's allele frequency for a particular gene are p=0.55 and q=0.45. If you come back and examine ....
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The population is evolving
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If you examine a population for a particular gene where B represents the dominate allele and b represents the recessive allele l, you find that the allele frequencies for this gene ...:
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0.42
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Which of the following situations would represent a situation that reduces the effect of genetic drift
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The population is very large
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If you examine the gene pool of a population due to genetic drift, what do you predict will occur with the allele frequencies
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There is no way to tell how p or q will change
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Which of the following conditions can lead to two populations becoming different species
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All of the above can lead to two populations becoming different species
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Which of the following statements is false
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The 13 diff species of finches flew to the Galápagos Islands and separated themselves in response to diff food environments
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All of Darwins Finches came from a single species with a normal beak. Which of the following factors can explain the development of the variety of breaks seen in those finches today
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A,B,+ C (answer D)
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Which of the following statements regarding the dating of fossils is false ?
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Fossils can be dated using a microscope to examine tissue
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Which of the following scenarios would be least likely to result in a fossil
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A jelly fish that dies and slowly floats to the bottom of the ocean
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Which of the following changes in the evolutionary history of horses is documented by the fossil record?
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A gradual decrease in the number of toes
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Which of these characteristics would be expected to apply to a transitional fossil?
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B and C (answer E)
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Which of the following sequence places Tiktaalik in the correct evolutionary order?
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Lobe-finned fish, Tiktaalik, tetrapods
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What can we learn about vertebrae evolution from Tiktaalik that we did not know before??
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How vertebrates evolved tetrapod limbs
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The variation in shape and function of the forelimb in tetrapods is a result of _______
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Evolutionary adaptations to different environments
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The forelimb of a chicken and a primate contain many of the same bones arranged in the same order. This is an example of _____________.
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Homology
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All organisms share same 4 nucleotides, _________ make each
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Sequence
