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• 39. Three kinds of selection occur that cause changes in the normal distribution of phenotypes in a
• 40. In a population that is in Hardy-Weinberg equilibrium, the frequency of the allele a is 0.2. Wha
• 42. What is the important component retain the violet dye in the Gram-positive bacteria cell wall?(A
• 43. Among the invertebrates, arthropods are unique in possessing(A) a notochord. (B) open circulatio
• 44. Important terrestrial adaptations that evolved exclusively in seed plants include all of the fol
• 46. Which of the following definitions of “Animal” is not true?(A) Animals are multicellular eukaryo
• 47. Transport in plants include all of the following except(A) absorption of water and minerals from
• 49. Antibodies of the different classes IgM, IgG, IgA, IgD and IgE differ from each other in(A) the
• 48. A hummingbird with a beak that is too short to pollinate a flower is an example of(A) behavioral
• 50. Which of the following signal transduction molecules is not bound to the plasma membrane?(A) G p
• 51. Reabsorption of useful components of glomerular filtrate occurs in(A) Bowman’s capsule. (B) prox
• 41. Yeast is a member of which division?(A) Ascomycota (B) Zygomycota (C) Basidiomycota (D) Deuterom
• 52. Which of the following is true?(A) The leaves of both angiosperms and gymnosperms are covered by
• 53. Two animal species live in the same biome but on different continents. Although these two are no
• 45. Which of the following enzymes has the lowest pH optimum?(A) lipase (B) pepsin (C) trypsin (D)su
• 54. Suppose a mutation occurred in Drosophila in the region of DNA that codes for the protein called
• 55. What is the basis for the difference in the synthesis of the leading and lagging strands of DNA
• 56. Which of the following statements about photosynthesis is not true?(A) Photosynthesis is a redox
• 57. The Genetic Code is almost universal, that is, it is the same in all living systems. What is the
• 58. The direct energy source that drives ATP synthesis during oxidative phosphorylation is(A) the ox
• 59. Which of the following statements is a correct distinction between autotrophs and heterotrophs?(
• 60. A _ _ is a membrane-enclosed bag of hydrolytic enzymes that the cell uses to digest macromolecul
• 61. Which of the following pieces of evidence most directly contradicted the hypothesis that viruses
• 63. Of the plant hormones, which one most directly stimulates cell division and delays senescence?(A
• 64. Eukaryotic promoters usually have a nucleotide sequence about 25 nucleotides upstream from the t