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MCQs

Total Questions : 572 | Page 2 of 58 pages
Question 11. Cooling effect in plants is due to
  1.    Respiration
  2.    evaporation
  3.    Transpiration
  4.    all
 Discuss Question
Answer: Option D. -> all
Answer: (d).all
Question 12. The rate of transpiration will be slower if the humidity of air is
  1.    more
  2.    less
  3.    equal
  4.    reduced
 Discuss Question
Answer: Option A. -> more
Answer: (a).more
Question 13. In plants, the upward movement of water and mineral salts is mainly forced by
  1.    gravitational pull
  2.    transpiration pull
  3.    ionic pull
  4.    evaporation
 Discuss Question
Answer: Option B. -> transpiration pull
Answer: (b).transpiration pull
Question 14. The pressure act as helper to support the leaf and keep the leaf firm is
  1.    turgor
  2.    root
  3.    latent
  4.    air
 Discuss Question
Answer: Option A. -> turgor
Answer: (a).turgor
Question 15. In small plants the mechanism for upward movement of water is
  1.    transpiration pull
  2.    root pressure
  3.    capillary action
  4.    transpiration
 Discuss Question
Answer: Option C. -> capillary action
Answer: (c).capillary action
Question 16. Dominant diploid sporophyle generation alternates with inconspicuous haploid gametophyte gerperation, it is pattern of cycle of
  1.    pinus
  2.    cones
  3.    pine
  4.    all of these
 Discuss Question
Answer: Option A. -> pinus
Answer: (a).pinus
Question 17. Arrangement of unequal dichotomies in a single plane is called
  1.    planation
  2.    budding
  3.    webbing
  4.    overtopping
 Discuss Question
Answer: Option A. -> planation
Answer: (a).planation
Question 18. Xylem and phloem are called
  1.    non vascular tissue
  2.    vascular tissue
  3.    smooth tissue
  4.    supporting tissues
 Discuss Question
Answer: Option B. -> vascular tissue
Answer: (b).vascular tissue
Question 19. Gametophyte doesn't undergo reshuffling of genes because gamates are produced by
  1.    division
  2.    mitosis
  3.    meosis
  4.    conjugation
 Discuss Question
Answer: Option B. -> mitosis
Answer: (b).mitosis
Question 20. Edge of capsule of sporangium is made up of two parts, annulus and the
  1.    stomium
  2.    sori
  3.    sporophyll
  4.    chlorophyll
 Discuss Question
Answer: Option A. -> stomium
Answer: (a).stomium

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