51. The struggle for existence may be:
Answer: B. interspecific, intraspecific and environmental
Biology Class 11 Unit 14: Evolution MCQs
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52. Survival of the fittest is also called:
Answer: B. natural selection
53. Fittest individuals are those that:
Answer: D. reproduce most successfully in the environment
54. Natural selection causes an increase of:
Answer: B. favourable alleles in the population
55. The reappraisal of natural selection in terms of population genetics is:
Answer: B. Neo-Darwinism
56. According to Neo-Darwinism natural selection operates through:
Answer: B. variations and differential reproduction
57. Biogeography is the study of:
Answer: B. geographical distribution of plants and animals
58. Darwin noted that South America lacked:
Answer: C. rabbits, though the environment was suitable
59. Barriers which restrict the distribution of species include:
Answer: B. physical, environmental and ecological barriers
60. Evidence of evolution from molecular biology includes:
Answer: B. DNA as hereditary material with a universal genetic code, ATP and cytochrome c
61. The respiratory protein found in the respiratory chain of all aerobic organisms is:
Answer: C. cytochrome c
62. The number of amino acids used by living organisms to make protein is:
Answer: B. 20
63. Comparative anatomy studies:
Answer: C. similarities and differences in structures of different species
64. Homologous structures have:
Answer: B. different function but similar internal structure due to common ancestry
65. An example of homologous structures is:
Answer: C. arm of man, forelimb of horse, flipper of whale and wing of bat
66. Analogous structures have:
Answer: B. similar function and appearance but different origin
67. An example of analogous structures is:
Answer: B. wings of bat, bird and insect
68. Sepals, petals, stamens and carpels are:
Answer: B. homologous structures as they are modified leaves
69. Vestigial organs in humans include:
Answer: B. appendix and tail vertebrae
70. Vestigial organs are:
Answer: B. homologous, reduced and having lost most function
71. Divergent evolution results in:
Answer: B. homologous structures
72. Divergent evolution is the evolution of different species from:
Answer: B. a common ancestor in different habitats
73. Convergent evolution is the evolution of different species from:
Answer: B. different ancestors in a common habitat
74. Convergent evolution results in:
Answer: B. analogous structures
75. Leaves of tracheophytes, mosses and blades of algae are:
Answer: B. analogous
76. Which statement is true?
Answer: B. Human hand and wing of bat are homologous
77. Fitness according to Darwin refers to:
Answer: C. reproductive fitness of an organism
78. The statement "survival of the fittest" means:
Answer: C. the species most adaptable to changes survives
79. Prevalence of pesticide resistant insects supports:
Answer: B. Darwin's concept of natural selection
80. The oldest evidence of life on earth is of:
Answer: B. 3.7 billion years
81. The Cambrian explosion occurred about:
Answer: C. 500 million years ago
82. Humans appeared about:
Answer: C. 1.8 million years ago or less
83. These structures are:
Answer: B. homologous
84. This indicates:
Answer: B. divergent evolution from a common ancestor
85. Wings of a bat and an insect, in contrast, are:
Answer: B. analogous
86. The wings of bat and insect arose by:
Answer: B. convergent evolution
87. This is an example of:
Answer: C. natural selection
88. Darwin would describe the dark moths as:
Answer: B. fitter for that environment
89. The increase in dark moths is an increase of:
Answer: B. favourable alleles in the population
90. The initial variation in colour exists due to:
Answer: B. variations in the population
91. This view is known as:
Answer: B. Lamarckism
92. A drawback of this view is:
Answer: B. somatic changes are not inherited
93. The Darwinian explanation would be that:
Answer: B. giraffes with longer necks, by variation, survived and reproduced more
94. The book in which Lamarck presented his ideas is:
Answer: B. Philosophie Zoologique
95. This supports the:
Answer: B. endosymbiosis theory
96. The theory was proposed by:
Answer: C. Margulis
97. Mitochondria are believed to have come from an engulfed:
Answer: B. aerobic bacterium
98. Chloroplasts are believed to come from an engulfed:
Answer: B. photosynthetic bacterium
About Biology Class 11 Unit 14 MCQs (Federal Board)
These 98 Biology MCQs cover Class 11 Unit 14: Evolution of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 2 pages of 50. Use the Print button to save this chapter as a PDF.