Stake bisc 101 test 5 – Flashcards
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Which of the following is more fit?
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A 500 year old bristled cone pine tree that produces one hundred off spring each 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 o proceed? a) b)Variation within population c)Aquisition or adaptions d) e) all the above
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E
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Natural selection causes
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Changes of 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 uniform populations
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Natural selection that favors survival of extreme phenotype a of a population is called
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Diversifying selection
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When extreme phenotype 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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Natural selection Genetic drift Mutations in the gene pool Founder effect All 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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Gametic isolation Ecological isolation ✔️ Temporal isolation Behavioral isolation Mechanical isolation
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Pollen from a tomato plant lands on a grape fruit flower. The pollen fails to 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 evolution of a species?
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Mutation Natural selection Genetic drift Gene flow All 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 You get there by 100•2•.25 = 50
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Which of the following does not influence allele frequencies in a population?
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Natural selection Mutation Genetic drift Bottle neck effect All the above ✔️
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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 is not an example of adaptive evolution?
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Founder effect mutation gene flow bottleneck All choices are non adaptive ✔️
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You examine a population and note that it's allele frequencies for a particular gene are p = 0.55 and q=0.45. If you come back and examine the population after several generations and found that p and q didn't change, which or the following statements is false for this gene?
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The population is evolving
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If you examine a population for a particular genre where b represents the dominant allele and b is recessive... P= 0.3 And q =0.7 what would be the frequency of the heterozygous phenotype???
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0.42 Harty Weinberg
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Which of the following situations would represent a situation that reduces the effect of genetic drift?
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Th population is very large
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If you examine the gene pool of a population that is evolving due to genetic drift what do you predict will occur with the allele frequencies?
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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 the above can lead to speciation
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Which of the following statements is false?
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Th 13 different species of finches flew to the islands and separated themselves in response to different food environments
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All of Darwin's finches came from a single species with a normal beak. Which of the following factors can explain the development of the variety of beaks den in these finches today?
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A B and C
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Which of he following statements regarding the dating of fossils is false?
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Fossils can be dated using a microscope to examine tissue. Tissue doesn't fossilize
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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 does 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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It should have some similarly to species is that lived before it and have similarities to what comes after it
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Which of the following sequences places tiktaalik in the correct evolutionary order?
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Lobe finned fish tiltaalik tetrapods
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Which can we learn about vertebrate evolution from tiltaalik 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 or the forelimb in tetrapods is a result of?
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Evolutionary adaptions to different environments
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The forelimb of a chicken and a primate condition many of the same bones arranged in the same order. This is an example of?
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Homology
