Biology MCQs

31. Which nematode infects the roots of tobacco plants?
[A] Meloidogyne incognitia
[B] Ditylenchus dipsaci
[C] Xiphinema index
[D] Nacobbus aberrans

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32. Which of the following organism can transfer ‘T-DNA’ within plants?
[A] Agrobacterium tumifaciens
[B] E.coli
[C] Aspergillus niger
[D] S. typhi

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33. In coriander, the useful parts are
____:
[A] Leaves & flowers
[B] Flowers & dried fruits
[C] Roots & leaves
[D] Leaves & dried fruits

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34. Lungs are the primary organs of ____:
[A] Digestion
[B] Respiration
[C] Constipation
[D] Perspiration

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35. What is the Normal Blood Volume in human adult?
[A] 1 litre
[B] 3 litre
[C] 5 litre
[D] 7 litre

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36. Jaws are absent in ____:

[A] Birds
[B] Fishes
[C] Reptiles
[D] Protochordata

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37. The elements known as primary nutrients for plants are ____:
[A] Nitrogen, Phosphorus and Potassium
[B] Potassium, Boron and Nitrogen
[C] Nitrogen, Oxygen and Silicon
[D] Nitrogen, Phosphorus and Iron

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38. Meibomian glands are located in ____:
[A] Eye
[B] Ear
[C] Nose
[D] Skin

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39. Which of the following organ is responsible to remove nitrogenous waste from body?
[A] Liver
[B] Lungs
[C] Kidney
[D] Pancreas

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40. Taxonomy is a science that deals with ____:
[A] Anatomy
[B] Morphology
[C] Economic uses
[D] Classification

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