| 41. | Xylem moves water and inorganic molecules within the plant and phloem accounts for organic molecule transportation.
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| 42. | The fibres of the xylem are always lignified, while those of the phloem are cellulosic.
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| 43. | The phloem limited positive sense RNA virus infects potatoes and other members of the family Solanaceae.
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| 44. | The data showed that beet leafhoppers primarily ingested phloem sap along with xylem and mesophyll sap.
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| 45. | The trunk is composed of sleeves of conductive tissue, most notably the phloem and xylem.
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| 46. | The larvae initially excavate cavities in the phloem and cambium and later galleries into the wood.
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| 47. | They bore into the bark and feed on the phloem at base of their host plant.
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| 48. | The vascular bundles of the stem are arranged such that the xylem and phloem form concentric rings.
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| 49. | The causative agents are fastidious phloem-restricted, Gram-negative bacteria in the gracilicutes clade.
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| 50. | Inside the phloem is a layer of undifferentiated cells one cell thick called the vascular cambium layer.
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