Biology MCQs

11. Which organs have different basic structures, yet present a similarity in appearance and perform analogous functions?
[A] Kidney and liver
[B] Heart and lungs
[C] Wings of a bat and a bird
[D] Brain and spinal cord

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12. Which of the following is the reason behind when one enters a dark room; he is not able to see anything but after some time his vision improves? (UPSC Prelims 1983)
[A] The retina of the eye comes forward
[B] The retina of the eye moves backward
[C] The pupil of the eye contracts
[D] The pupil of the eye dilates

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13. Which of the following clearly define Lineage? (UPSC Prelims 1986)
[A] A straight line joining any two points on the globe
[B] The line of descendants of a particular ancestor
[C] The paleolithic age
[D] The linking of genes

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14. Which one of the following vitamins is considered to be a hormone? (UPSC Prelims 1994)
[A] A
[B] B
[C] C
[D] D

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15. The branch of science that deals with the study of the mental faculties of the brain including emotions is known as__?
[A] Phenology
[B] Phycology
[C] Phrenology
[D] Proctology

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16. Why don’t diatoms perish quickly?
[A] Because they are Chitinous
[B] because it has siliceous walls
[C] because Diatoms contain saline soil
[D] because their body is impervious to water

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17. Which of the following is analogous to mesosome of bacteria?
[A] Mitochondria of eukaryotes
[B] Golgi apparatus of eukaryotes
[C] Lysosomes of eukaryotes
[D] None of these

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18. Which of the following statements regarding algae is incorrect.
[A] Most algae are photosynthetic
[B] Algae can be classified according to their pigments
[C] All algae are filamentous
[D] Spirogyra does not produce zoospores

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19. Which of the following is least likely to be found along the beach?
[A] Brown algae
[B] Red algae
[C] Mosses
[D] All the above

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20. Most of the gymnosperms have__?
[A] Only antheridia
[B] Both antheridia and archegonia
[C] Archegonia but no antheridia
[D] Both absent

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