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MCQs

Total Questions : 310 | Page 26 of 31 pages
Question 251. In plants, detection of either light or darkness is responsibility of
  1.    chlorophylls
  2.    carotenes
  3.    phytochromes
  4.    xanthophylls
 Discuss Question
Answer: Option C. -> phytochromes
Answer: (c).phytochromes
Question 252. Internal lining of uterus wall is called
  1.    endometrium
  2.    peritonium
  3.    epithelium
  4.    edothelium
 Discuss Question
Answer: Option A. -> endometrium
Answer: (a).endometrium
Question 253. In absence of a male gamete in plants a diploid cell of ovule develops into a functional embryo through process of
  1.    parthenogenesis
  2.    apomixis
  3.    budding
  4.    haploid parthenogenesis
 Discuss Question
Answer: Option B. -> apomixis
Answer: (b).apomixis
Question 254. Menstruation stage lasts for about
  1.    1-2 days
  2.    3-7 days
  3.    5-10 days
  4.    10-15 days
 Discuss Question
Answer: Option B. -> 3-7 days
Answer: (b).3-7 days
Question 255. Light exerts its influence on living organisms through variations in day length called
  1.    biorythym
  2.    photoperiod
  3.    vernalisation
  4.    regeneration
 Discuss Question
Answer: Option B. -> photoperiod
Answer: (b).photoperiod
Question 256. Between mother and fetus placenta facilitates exchange of
  1.    oxygen
  2.    carbondioxide
  3.    waste and nutrients
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 257. Reuirement of length of dark period for cocklebur is
  1.    11-15 h
  2.    12-20 h
  3.    20-22 h
  4.    10-11 h
 Discuss Question
Answer: Option D. -> 10-11 h
Answer: (d).10-11 h
Question 258. Strawberry is a
  1.    long day plant
  2.    neutral plant
  3.    short day plant
  4.    day neutral plant
 Discuss Question
Answer: Option C. -> short day plant
Answer: (c).short day plant
Question 259. Germination of seeds in some lettuce varieties is promoted by
  1.    blue light
  2.    red light
  3.    green light
  4.    white light
 Discuss Question
Answer: Option B. -> red light
Answer: (b).red light
Question 260. In higher vertebrates, zygote after fertilization undergoes cell division by mitosis called
  1.    separation
  2.    segregation
  3.    cleavage
  4.    division
 Discuss Question
Answer: Option C. -> cleavage
Answer: (c).cleavage

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