Practice EOC Questions Part Four (61-80). 61. What is the key difference between mitosis and meiosis during the actual process? A. Both double the number.

Practice EOC Questions

Part FourPart Four

(61-80)(61-80)

61. What is the key difference between mitosis and meiosis during the actual process?

A. Both double the number of chromosomes, but in A. Both double the number of chromosomes, but in meiosis the cell divides twice.meiosis the cell divides twice.

B. In mitosis the number of chromosomes doubles twice B. In mitosis the number of chromosomes doubles twice and then divides.and then divides.

C. In meiosis the number of chromosomes does not C. In meiosis the number of chromosomes does not double, and the cell divides.double, and the cell divides.

D. In mitosis the number of chromosomes doubles and D. In mitosis the number of chromosomes doubles and then the cell divides thrice.then the cell divides thrice.

The correct answer is…The correct answer is… AA

62. What is the function of mitosis?

A. to make sperm or egg cellsA. to make sperm or egg cells B. to maintain the chromosome number in the offspringB. to maintain the chromosome number in the offspring C. to produce more DNA for protein synthesisC. to produce more DNA for protein synthesis D. to produce more body cellsD. to produce more body cells

The correct answer is…The correct answer is… DD

63. Why is sexual reproduction usually considered more advantageous than asexual reproduction? A. It maintains the same exact DNA from one generation

to the next. B. It helps to increase genetic variation. C. It promotes more interaction between males and

females of the same species. D. It helps maintain the chromosome number of the

species. The correct answer is… B

64. Many simple organisms like bacteria reproduce asexually most of the time. What could be a source of genetic variation for these organisms?

A.A. Crossing overCrossing over

B.B. Random assortment of chromosomesRandom assortment of chromosomes

C.C. MutationMutation

D.D. Random matingRandom mating

The correct answer is…The correct answer is…

CC

65. Why are mutations, which are usually negative, sometimes considered beneficial to an organism or species?

A. They provide genetic variation.A. They provide genetic variation. B. They help to eliminate other harmful genes.B. They help to eliminate other harmful genes. C. They help to increase the size of the genome.C. They help to increase the size of the genome. D. What is harmful to one species may be D. What is harmful to one species may be

beneficial to another.beneficial to another.


66. Which of the following is an advantage of asexual reproduction?

A. Daughter cells are exact copies of each other.A. Daughter cells are exact copies of each other. B. Only one parent is involved.B. Only one parent is involved. C. Exact copies of favorable traits will be C. Exact copies of favorable traits will be

inherited.inherited. D. Many clones of the mother may be produced.D. Many clones of the mother may be produced.

The correct answer is…The correct answer is… CC

67. The allele for hemophilia is sex-linked recessive. Mr. Perkins is a hemophiliac. Mrs. Perkins is a carrier. What percent chance would the Perkins’ offspring have of being hemophiliacs?

A. 0%A. 0% B. 25%B. 25% C. 50%C. 50% D. 100%D. 100%


68. The Johnsons have two children, Jack and Jill. Jack has type A blood and Jill has type B blood. Which one of these pairings could represent the blood type of the parents?

A. Type A and Type OA. Type A and Type O B. Type AB and Type AB. Type AB and Type A C. Type O and Type BC. Type O and Type B D. Answer cannot be determined from the D. Answer cannot be determined from the

information given.information given.

The correct answer is…The correct answer is… BB

69. Scientists discovered a strain of bacteria that is capable of digesting oil. How might these bacteria be most helpful to scientists?

A. The bacteria could produce oil for fuel.A. The bacteria could produce oil for fuel. B. The bacteria could make new products from B. The bacteria could make new products from

petroleum.petroleum. C. The bacteria could be used to clean up oil spills.C. The bacteria could be used to clean up oil spills. D. The bacteria could improve the quality of D. The bacteria could improve the quality of

petroleum.petroleum.


70. In a lab the stain methyl green-pyronin Y is used to detect the presence of DNA and RNA. Methyl green is absorbed by the DNA and stains it blue. If you observed the a stained slide of an onion root tip under the microscope, which structures would you expect to be stained blue?

A. chloroplastA. chloroplast B. chromosomeB. chromosome C. ribosomesC. ribosomes D. nucleoliD. nucleoli

The correct answer is…The correct answer is… BB

71. Two different bacterial strains are placed in the same petri dish. Strain A is resistant to the antibiotic Ampicillin while Strain B is resistant to the antibiotic Streptomycin. Under certain circumstances the bacteria exchange DNA. Which experiment would best show if these two strains exchanged DNA?

A. expose both strains to another antibioticA. expose both strains to another antibiotic B. expose both strains to Ampicillin onlyB. expose both strains to Ampicillin only C. expose both strains to Streptomycin onlyC. expose both strains to Streptomycin only D. expose both strains to both Ampicillin and D. expose both strains to both Ampicillin and

StreptomycinStreptomycin


72. Which statement best describes a plasmid?

A. a small circular DNA found in some bacterial A. a small circular DNA found in some bacterial cellscells

B. a type of DNA found in yeast cellsB. a type of DNA found in yeast cells C. a small piece of DNA found in frogsC. a small piece of DNA found in frogs D. an enzyme used to cut DNAD. an enzyme used to cut DNA


73. Which of the following is used to cut DNA into fragments?

A. clonesA. clones B. recombinant DNAB. recombinant DNA C. vectorsC. vectors D. restriction enzymesD. restriction enzymes


74. Which of the following statements best describes the function of the polymerase chain reaction (PCR)?

A. It is used to cut DNA into fragments.A. It is used to cut DNA into fragments. B. It is used to carry DNA from one cell to B. It is used to carry DNA from one cell to

another.another. C. It is used to separate DNA into fragments.C. It is used to separate DNA into fragments. D. It is used to make copies of DNA.D. It is used to make copies of DNA.


75. For several years scientists around the world have been working on the Human Genome Project. What is the main purpose of the project?

A. to locate all human genesA. to locate all human genes B. to slice and clone genesB. to slice and clone genes C. to find cures for infectious diseaseC. to find cures for infectious disease D. to alter DNA in genesD. to alter DNA in genes


76. Insects, such as ants, dragonflies, and moths belong to class Insecta. To which phylum does the class Insecta belong?

A. CnidariaA. Cnidaria B. ChordataB. Chordata C. ArthropodaC. Arthropoda D. AnnelidaD. Annelida


77.The water cycle involves the movement of water between the earth and the atmosphere. If a forest was logged along the banks of a stream leaving no buffers, what would the probable outcome be?

A. increased ground water due to lack of tree coverA. increased ground water due to lack of tree cover B. increased fish in the surrounding streamsB. increased fish in the surrounding streams C. increased oxygen in surrounding streamsC. increased oxygen in surrounding streams D. increased sediments in surrounding streamsD. increased sediments in surrounding streams


78. During the carbon cycle, carbon dioxide is normally released as a byproduct of respiration. Major human impact on this cycle causes much more carbon dioxide to be released. As a result, what environmental problem confronts humans today?

A. global warmingA. global warming B. ozone depletionB. ozone depletion C. habitat destructionC. habitat destruction D. water quality degradationD. water quality degradation


79. Circadian rhythm is defined as a recurring behavioral pattern that occurs in approximately 24 hour cycles. Which one of the following is an example of circadian rhythm?

A. hibernationA. hibernation B. estivationB. estivation C. animals moving from one area to another as C. animals moving from one area to another as

seasonal time changesseasonal time changes D. water lily blooms that open during the day and D. water lily blooms that open during the day and

close at nightclose at night


80. As the steps of succession progress, state what happens.

A. Species diversity and plant growth rate are high during A. Species diversity and plant growth rate are high during primary succession.primary succession.

B. Plant growth rate and species diversity are equal during B. Plant growth rate and species diversity are equal during secondary succession.secondary succession.

C. Plant growth rate is low and species diversity is high in C. Plant growth rate is low and species diversity is high in the climax forest.the climax forest.

D. Both plant growth rate and species diversity are high in D. Both plant growth rate and species diversity are high in secondary succession.secondary succession.

The correct answer is..The correct answer is.. CC

Practice EOC Questions Part Four (61-80). 61. What is the key difference between mitosis and meiosis during the actual process? A. Both double the number.

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