Biology MCQs

11. Which of the following concepts was explained by Stephen Hales?
[A] new species are formed from the sudden and unexpected emergence of alterations in their defining traits.
[B] plant function and behaviour
[C] principles of genetics and inheritance to the improvement of the human race
[D] None of these

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12. Viral DNA is removed from the host’s chromosomes and the lytic cycle is called which of the following process?
[A] spontaneous induction
[B] inductive infection
[C] resultant induction
[D] spontaneous infection

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13. Classification is based on the following criteria?
[A] Plant body
[B] Vascular system
[C] Seed formation
[D] All of the above

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14. Which of the following may be most likely to be missing from a gram-positive bacterium?
[A] Penicillin-binding protein
[B] Peptidoglycan
[C] Lipopolysaccharide
[D] Phospholipid bilayer membrane

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15. The sporophytic generation is represented only by the zygote__?
[A] Funaria
[B] Chlamydomonas
[C] Pinus
[D] Pinus

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16. The energy wastage in plants occurs during which of the following?
[A] Dark reaction
[B] Photosynthesis
[C] Photorespiration
[D] None of these

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17. The grass is an example of which root?
[A] Nodulose Roots
[B] Moniliform Roots
[C] Annulated Roots
[D] Prop Roots

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18. Which plant disease is known as ring disease?
[A] Citrus Canker
[B] Black arm of cotton
[C] Wilt of Potato
[D] None of the above

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19. Name a disease of plant in which dark to light brown rot forms around wounded plant tissue?
[A] Gray Mold
[B] Citrus Canker
[C] Spider Mites
[D] None of the above

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20. How many million years ago did adaptive radiation begin in fish?
[A] 1200
[B] 500
[C] 1000
[D] 1500

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