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MCQs

Total Questions : 310 | Page 3 of 31 pages
Question 21. Tobacco plant flowers only after exposure to
  1.    a series of long days
  2.    a series of dark days
  3.    a series of light days
  4.    a series of short days
 Discuss Question
Answer: Option D. -> a series of short days
Answer: (d).a series of short days
Question 22. Special condition of rest which enables an embryo to survive long periods of unfavourable conditions is called
  1.    seed sleep
  2.    seed inactivity
  3.    seed dormancy
  4.    seed rest
 Discuss Question
Answer: Option C. -> seed dormancy
Answer: (c).seed dormancy
Question 23. If two generations during alternation of generation in plants are vegetatively similar it is referred to as
  1.    heteromorphic
  2.    isomorphic
  3.    diplohaplontic
  4.    none of the above
 Discuss Question
Answer: Option B. -> isomorphic
Answer: (b).isomorphic
Question 24. Average age of menupause for females is
  1.    30 years
  2.    41 years
  3.    51 years
  4.    60 years
 Discuss Question
Answer: Option C. -> 51 years
Answer: (c).51 years
Question 25. Once placenta is established, it starts secreting hormone
  1.    estrogen
  2.    oxytocin
  3.    progesterone
  4.    testosterone
 Discuss Question
Answer: Option C. -> progesterone
Answer: (c).progesterone
Question 26. In females, production of egg is a
  1.    continuous process
  2.    cyclic activity
  3.    never ending process
  4.    once in a life time event
 Discuss Question
Answer: Option B. -> cyclic activity
Answer: (b).cyclic activity
Question 27. Meiosis is also known as
  1.    binary fission
  2.    parthenogenesis
  3.    reduction division
  4.    none of the above
 Discuss Question
Answer: Option C. -> reduction division
Answer: (c).reduction division
Question 28. If two gametes uniting are different in size and structure, they are called
  1.    heterogametes
  2.    anisogamete
  3.    isogamete
  4.    Both a and b
 Discuss Question
Answer: Option D. -> Both a and b
Answer: (d).Both a and b
Question 29. Red light promotes
  1.    germination of fern spores
  2.    leaf expansion in dicots
  3.    leaf unrolling in grasses
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 30. Despite tape worm being bisexual, cross fertilization is ensured to maintain
  1.    genetic recombination
  2.    genetic variability
  3.    new combinations of traits
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above

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