GS Biology Questions and Answers

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Q191
Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
  • A tetanus
  • B influenza
  • C cholera
  • D typhoid
Answer: Option C
Q192
Plants hormone that induces cell division is
  • A auxins
  • B gibberellins
  • C kinins
  • D domins
Answer: Option C
Q193
Pollination is best defined as
  • A transfer of pollen from anther to stigma
  • B germination of pollen grains
  • C growth of pollen tube in ovule
  • D visiting flowers by insects
Answer: Option A
Q194
Photosynthesis is a process
  • A reductive and exergonic
  • B reductive and catabolic
  • C reductive, endergonic and catabolic
  • D reductive, endergonic and anabolic
Answer: Option D
Q195
Nymph is the name of young one of
  • A butterfly
  • B beetle
  • C housefly
  • D cockroach
Answer: Option D
Q196
The Galapagos Islands are associated with the visit of
  • A Jean Lamarck
  • B Charles Darwin
  • C Gregor Mendel
  • D Alfred Wallace
Answer: Option B
Explanation: Charles Darwin's visit to the Galapagos Islands contributed to his theory of natural selection.
Q197
Which of the following was most influential upon Darwin’s formulation of theory of natural selection?
  • A De Vries concept of mutation
  • B Wallace’s paper on survival
  • C Malthus’s essay on population
  • D Lamarck’s on inheritance of acquired characters
Answer: Option C
Explanation: Malthus’s essay on population influenced Darwin's ideas on competition and survival.
Q198
‘Survival of the fittest’ was used by
  • A Charles Darwin
  • B Jean Baptiste Lamarck
  • C Hugo de Vries
  • D Herbert Spencer
Answer: Option D
Explanation: Herbert Spencer coined the phrase ‘Survival of the fittest’ to describe natural selection.
Q199
After observing the variations Hugo de Vries first described the mutation in
  • A Oenothera lamarkiana
  • B Neurospora crassa
  • C Pisum sativum
  • D Drosophila melanogaster
Answer: Option A
Explanation: Hugo de Vries studied mutations in the plant Oenothera lamarkiana.
Q200
According to scientists, the Big Bang occurred approximately how many years ago?
  • A 100 million
  • B 100 thousand
  • C 1 billion
  • D 15 billion
Answer: Option D
Explanation: The Big Bang is estimated to have occurred around 15 billion years ago.

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