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MCQs

Total Questions : 61 | Page 3 of 7 pages
Question 21. Nitrosomonous and Nitrobacter obtain their carbon for growth from
  1.    organic compounds
  2.    carbon dioxide
  3.    elementary carbon
  4.    none of these
 Discuss Question
Answer: Option B. -> carbon dioxide
Answer: (b).carbon dioxide
Question 22. Organisms capable of converting N2 to NO3 are
  1.    yeasts
  2.    bacteria
  3.    roundworms
  4.    moulds
 Discuss Question
Answer: Option B. -> bacteria
Answer: (b).bacteria
Question 23. Chlorophyll is associated with
  1.    thylakoids
  2.    stroma
  3.    cristae
  4.    matrix
 Discuss Question
Answer: Option A. -> thylakoids
Answer: (a).thylakoids
Question 24. Which group of plants has the greatest diversity (i.e. the most species) living today?
  1.    Bryophyta
  2.    Lycophyta
  3.    Gymnosperms
  4.    Angiosperms
 Discuss Question
Answer: Option D. -> Angiosperms
Answer: (d).Angiosperms
Question 25. In angiosperm, the endosperm is
  1.    haploid
  2.    diploid
  3.    triploid
  4.    none of these
 Discuss Question
Answer: Option C. -> triploid
Answer: (c).triploid
Question 26. Auxanometer is used for measuring
  1.    respiratory activity
  2.    photosynthetic activity
  3.    growth activity
  4.    osmotic pressure
 Discuss Question
Answer: Option C. -> growth activity
Answer: (c).growth activity
Question 27. Which group of land plants is most restricted to moist environments?
  1.    Lycophyta
  2.    Sphenophyta
  3.    Bryophyta
  4.    Angiosperms
 Discuss Question
Answer: Option C. -> Bryophyta
Answer: (c).Bryophyta
Question 28. What single feature is probably most responsible for the success of angiosperms?
  1.    Seeds
  2.    Fruit
  3.    Broad leaves
  4.    Flowers
 Discuss Question
Answer: Option D. -> Flowers
Answer: (d).Flowers
Question 29. Rice can grow in water submerged soil because the plants
  1.    have spongy roots
  2.    can oxidize the micro-environment around their roots and thus able to absorb oxygen
  3.    are adapted to enable roots to ward off toxic products
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 30. Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?
  1.    Nitrospina
  2.    Nitrobacter
  3.    Nitrosococcus
  4.    Nitrosobacter
 Discuss Question
Answer: Option C. -> Nitrosococcus
Answer: (c).Nitrosococcus

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