81. The part of the stem where a leaf arises is known as
82. Consider the following statements and choose the correct answer:
1. Classifications based on phylogeny are termed as 'Phylogenetic classification'
2. Experimental taxonomy is more practical since it involves physiological, ecological, cytological, chromosomal and hybridization studies
3. The nature of character development in plants is tested through transplanting technique since variations in phenotypes may be attributed
4. Non-hereditary variations are considered in experimental taxonomy
1. Classifications based on phylogeny are termed as 'Phylogenetic classification'
2. Experimental taxonomy is more practical since it involves physiological, ecological, cytological, chromosomal and hybridization studies
3. The nature of character development in plants is tested through transplanting technique since variations in phenotypes may be attributed
4. Non-hereditary variations are considered in experimental taxonomy
83. Which of the following vegetative trichomes are multicellular and uniseriate wholly or in part, with first division of the trichome initial periclinal ?
84. Which of the following are syncytes or tubes through which conduction can easily take place because cross walls are absent or are perforated by small or large pores?
85. Foundation of International Code of Botanical Nomenclature was laid by
86. In almost all the members of Psilopsida, the stele is of the type
87. The wall of parenchyma is composed of
88. Lichen are the complex creature, made from
89. The principal components of xylem tissues include
90. The virus particles or virions are measured by the metric system unit known as
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