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The Colorado potato beetle has a history of pesticide resistance. The graph shows the number of chemical insecticides used in agriculture that the Colorado beetle population has become resistant to from 1950 to 2010. It took longer for the population of potato beetle to develop a resistance to some insecticides. However, by 1990, the Colorado potato beetle population had developed a resistance to 35 different kinds of insecticides, and farmers ran out of insecticides they could use to control the beetle population. A new type of insecticide was introduced in 1995. 60 40 30 20 10 1960 1970 1980 1990 2000 Year of Report Which of the following best describes what happened from 1965 to 1975 and again from 1995 to 2000 to the insecticide resistance of the beetle population? The Colorado beetle gene pool for insecticide resistance was identical and the insecticide had no effect on the beetle population, which is why it continued to increase. The introduced insecticides were effective for a short period but as the beetles with alleles allowing them to be resistant were selected for, they began to reproduce. When the new insecticides were used, the beetles that were not resistant decided to fly away and came back later to interbreed with the insecticide-resistant beetles, which increased the population. As the beetle population was introduced to the new insecticide, the beetles changed their gene pool until it found a new allele that was resistant to the insecticide and shared it with the other beetles. Number of Pesticides Used

The Colorado potato beetle has a history of pesticide resistance. The graph shows the number of chemical insecticides used in agriculture that the Colorado beetle population has become resistant to from 1950 to 2010. It took longer for the population of potato beetle to develop a resistance to some insecticides. However, by 1990, the Colorado potato beetle population had developed a resistance to 35 different kinds of insecticides, and farmers ran out of insecticides they could use to control the beetle population. A new type of insecticide was introduced in 1995. 60 40 30 20 10 1960 1970 1980 1990 2000 Year of Report Which of the following best describes what happened from 1965 to 1975 and again from 1995 to 2000 to the insecticide resistance of the beetle population? The Colorado beetle gene pool for insecticide resistance was identical and the insecticide had no effect on the beetle population, which is why it continued to increase. The introduced insecticides were effective for a short period but as the beetles with alleles allowing them to be resistant were selected for, they began to reproduce. When the new insecticides were used, the beetles that were not resistant decided to fly away and came back later to interbreed with the insecticide-resistant beetles, which increased the population. As the beetle population was introduced to the new insecticide, the beetles changed their gene pool until it found a new allele that was resistant to the insecticide and shared it with the other beetles. Number of Pesticides Used

Biology Today and Tomorrow without Physiology (MindTap Course List)
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter15: Animal Evolution
Section: Chapter Questions
Problem 1CT
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The Colorado potato beetle has a history of pesticide resistance. The graph shows the number of chemical insecticides used in agriculture that the Colorado beetle population has become resistant to from 1950 to 2010. It took longer for the population of potato beetle to develop a resistance to some insecticides. However, by 1990, the Colorado potato beetle population had developed a resistance to 35 different kinds of insecticides, and farmers ran out of insecticides they could use to control the beetle population. A new type of insecticide was introduced in 1995. 60 40 30 20 10 1960 1970 1980 1990 2000 Year of Report Which of the following best describes what happened from 1965 to 1975 and again from 1995 to 2000 to the insecticide resistance of the beetle population? The Colorado beetle gene pool for insecticide resistance was identical and the insecticide had no effect on the beetle population, which is why it continued to increase. The introduced insecticides were effective for a short period but as the beetles with alleles allowing them to be resistant were selected for, they began to reproduce. When the new insecticides were used, the beetles that were not resistant decided to fly away and came back later to interbreed with the insecticide-resistant beetles, which increased the population. As the beetle population was introduced to the new insecticide, the beetles changed their gene pool until it found a new allele that was resistant to the insecticide and shared it with the other beetles. Number of Pesticides Used
Transcribed Image Text:The Colorado potato beetle has a history of pesticide resistance. The graph shows the number of chemical insecticides used in agriculture that the Colorado beetle population has become resistant to from 1950 to 2010. It took longer for the population of potato beetle to develop a resistance to some insecticides. However, by 1990, the Colorado potato beetle population had developed a resistance to 35 different kinds of insecticides, and farmers ran out of insecticides they could use to control the beetle population. A new type of insecticide was introduced in 1995. 60 40 30 20 10 1960 1970 1980 1990 2000 Year of Report Which of the following best describes what happened from 1965 to 1975 and again from 1995 to 2000 to the insecticide resistance of the beetle population? The Colorado beetle gene pool for insecticide resistance was identical and the insecticide had no effect on the beetle population, which is why it continued to increase. The introduced insecticides were effective for a short period but as the beetles with alleles allowing them to be resistant were selected for, they began to reproduce. When the new insecticides were used, the beetles that were not resistant decided to fly away and came back later to interbreed with the insecticide-resistant beetles, which increased the population. As the beetle population was introduced to the new insecticide, the beetles changed their gene pool until it found a new allele that was resistant to the insecticide and shared it with the other beetles. Number of Pesticides Used
Scientists studied gene expression and phenotypes of the YJL213W gene in yeast to determine how phosphate was transported based on two different genotypes. The PHO84 locus of the gene is a phosphate transporter and the PHO4 locus is a regulator of genes that respond to phosphate availability. Two genotypes were compared and are shown in the graph: BY (solid black line, triangles) and RM (dashed line, Xs). PHO4-PHO84 Interaction PHO84 locus A BY X RM -0.9 -0.6 -0.3 0.0 0.3 PHO4 activation Which of the following statements describes the correlation between the genotype, phosphate concentration, and YJL213W expression based on the data? In RM genotypes, a lower PHO4 activation level led to less YJL213W expression and a lower rate of phosphate transport. In RM genotypes, a greater PHO4 activation level led to less YJL213W expression and a lower rate of phosphate transport. In BY genotypes, a lower activation level of PHO4 led to more YJL213W expression and a higher rate of phosphate transport. In BY genotypes a greater activation level of PHO4 led to more YJL213W expression and a higher rate of phosphate transport. YJL213W expression
Transcribed Image Text:Scientists studied gene expression and phenotypes of the YJL213W gene in yeast to determine how phosphate was transported based on two different genotypes. The PHO84 locus of the gene is a phosphate transporter and the PHO4 locus is a regulator of genes that respond to phosphate availability. Two genotypes were compared and are shown in the graph: BY (solid black line, triangles) and RM (dashed line, Xs). PHO4-PHO84 Interaction PHO84 locus A BY X RM -0.9 -0.6 -0.3 0.0 0.3 PHO4 activation Which of the following statements describes the correlation between the genotype, phosphate concentration, and YJL213W expression based on the data? In RM genotypes, a lower PHO4 activation level led to less YJL213W expression and a lower rate of phosphate transport. In RM genotypes, a greater PHO4 activation level led to less YJL213W expression and a lower rate of phosphate transport. In BY genotypes, a lower activation level of PHO4 led to more YJL213W expression and a higher rate of phosphate transport. In BY genotypes a greater activation level of PHO4 led to more YJL213W expression and a higher rate of phosphate transport. YJL213W expression
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