61. Which of the following bacterium causes crown gall disease in plants?
62. Fossils of blue green algae were found in lime stones with the age almost as old as
63. They have also proved extremely useful in our quest of knowledge of outer space.
64. Chemicals like ________ may be added to different foods or fruits to prevent or retard the growth microorganisms.
65. Eutrophication is the result of
66. Mycology is the branch of botany in which we study about
67. Mycology is the branch of botany in which we study about
68. Phycology is the branch of botany in which we study about
69. The DNA bacterium consists of ring-like pieces known as the
70. It is commonly found in the bottom tidal pools?
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