21. Which of the following appendices of the recommendations of ICBN lists the names of genera which are conserved against the principle of priority because of their long use?
22. Consider the following statements and choose the correct answer:
1. Spores of pine are borne in cones
2. In pine, the sporophyte is the smaller generation and after germination is dependent
3. In pine, there are two kinds of spores - microspores and megaspores
4. The male gametophyte of pine is a dependent structure and is reduced to six cells
1. Spores of pine are borne in cones
2. In pine, the sporophyte is the smaller generation and after germination is dependent
3. In pine, there are two kinds of spores - microspores and megaspores
4. The male gametophyte of pine is a dependent structure and is reduced to six cells
23. The central or axial filament forming the core of the fungal flagellum is known as
24. One of the . . . . . . . ., the giant redwood tree Sequoia is one of the tallest tree species.
25. According to which principles, construction of taxa in hierarchical system may be based on similarity factor amongst individuals expressed in terms of character analysis?
26. The tallest plant in the world is
27. Match List-I with List-II and select the correct answer:
List-I
List-II
a. Macrosclereids
1. Small and more or less isodiametric in shape
b. Astrosclereids
2. Rod shaped elongated sclereids
c. Osteosclereids
3. Bone or barrel-shaped sclereids
d. Brachy-sclereids
4. Star-shaped sclereids with extreme lobes or arms
e. Trichosclereids
5. Hair-like sclereid
| List-I | List-II |
| a. Macrosclereids | 1. Small and more or less isodiametric in shape |
| b. Astrosclereids | 2. Rod shaped elongated sclereids |
| c. Osteosclereids | 3. Bone or barrel-shaped sclereids |
| d. Brachy-sclereids | 4. Star-shaped sclereids with extreme lobes or arms |
| e. Trichosclereids | 5. Hair-like sclereid |
28. Water conduction takes place in mosses through
29. In bacteria the components of the electron transport system are located in the
30. An antibiotic commonly acts by
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