Sunday, March 18, 2012

PLANT KINGDOM INTRODUCTION,SPIROGYRA AND RHIZOPUS-ASSIGNMENT

1 Sex organs of Bryophytes are
I. Stalked
II. Multicellular
III. Jacketed





Ans:I, II and III
2 [A]: Funaria is a Bryophyte
[R]: It has embryo





Ans:Both A and R are true but R is not the correct explanation of A
3 The following bryophyte exhibits symbiosis




Ans:Anthoceros
4 Bryophytes are
I. First land plants
II. First Archegoniates
III. Primitive embryophytes
IV. First Oogamous plants





Ans:I, II, III
5 In Pteridophytes




Ans:Both gametophyte and sporophyte are independent
6 Pteridophytes are




Ans:First Tracheophytes
7 A sorus of Pteris with 100 sporangia is developed from 100 sporangial initials. Pteris is best described as




Ans:Leptosporangiate Pteridophyte
8 Fronds of Pteridophytes are




Ans:Macrophylls
9 Gymnosperms do not have
I. Ovary
II. Perianth
III. Endosperm
IV. Pericarp





Ans:all except III
10 All gymnosperms lack




Ans:Companian cells
11 The following structures form cones in Gymnosperms
I. Foliage leaves
II. Scale leaves
III. Microsporophylls
IV. Megasporophylls





Ans:III, IV
12 Embryo of Gymnosperms gets nourishment from




Ans:Female gametophyte
13 Match the following





Ans:A - III, B - I, C - II, D - V
14 Match the following





Ans:A - II, B - IV, C- III, D - I
15 [A]: Pond scum is named as Spirogyra
[R]: Its filaments are entangled with each other in free floating forms





Ans:Both A and R are true but R is not the correct explanation of A
16 Demorphic cells are seen in
I. Spirogyra jogensis
II. Spirogyra adnata
III. Spirogyra mirabilis
IV. Spirogyra affinis





Ans:All
17 If a free floating monoecious of Spirogyra has 40 cells and all of its cells are involved in sexual reproduction, how many meiotic and mitotic nuclei are degenerated during the formation of daughter filaments with each filament having 40 cells.




Ans:60, 20
18 [A]: Life cycle of Spirogyra is haplontic
[R]: It has no diploid stages in its life cycle





Ans:A is true but R is false
19 [A]: Spirogyra gratiana shows scalariform conjugation
[R]: It is dioecious





Ans:A is true but R is false
20 Male gamete of Spirogyra jogensis differs with female gamete in
I. Size
II. Shape
III. Function





Ans:I, II, III
21 In a free floating indirect lateral conjugating filament of Spirogyra, there are 50 cells. Upon successful completion of sexual reproduction, there is formation of free floating daughter filaments with each one having same number of cells as that of parental filament. During this course, the total number of nuclei formed and number of formed nuclei not involved as a part of the free filaments are respectively




Ans:1350, 100
22 Presence of mucilage ribs arranged parallel to long axis of the cell is a feature of




Ans:Female cell with Zygospore of Spirogyra jogensis
23 The sequence of events that take place during scalariform conjugation are
I. Secretion of mucilage
II. Formation of Papillae
III. Complete formation of gametes
IV. Opposite alignment of male and female filaments





Ans:IV, I, II, III
24 Rattan studied




Ans:Direct lateral conjugation in Spirogyra mirabilis
25 In isogamous species of Spirogyra, the zygospores are formed in




Ans:Conjugation canal
26 The enzyme cytase has no role in the sexual reproduction of
I. Spirogyra gratiana
II. Spirogyra mirabilis
III. Spirogyra jogensis
IV. Spirogyra affinis





Ans:II and III
27 Chain like appearance of Spirogyra filament is noticed during




Ans:Conjugation of Spirogyra affinis
28 Decay of parental cell wall is noticed during non-sexual reproduction in




Ans:Spirogyra aplanosporum
29 If a Spirogyra free floating filament with 20 cells is broken into pieces with each fragment consisting of 5 cells, how many mitotic divisions have to occur to form daughter filaments with each filament having same number of cells as that of parental filament




Ans:60
30 Study the following table and choose the correct combination





Ans:I and II
31 Filaments show apical basal differentiation in
I. Spirogyra gratiana
II. Spirogyra jogensis
III. S. adnata





Ans:II and III
32 In the vegetative cells of Spirogyra venkataramanii,
I. Nuclei and Chloroplasts exist in 1:1 ratio
II. No of Pyrenoids in a cell and chloroplasts in 1:1 ratio
III. Pyrenoids and Cytoplasmic strands exist in 1:1 ratio
IV. Cells and chloroplsts exist in I:1 ratio





Ans:II and III are incorrect
33 [A]: All Pond scums are pond silks
[R]: All pond silks are pond scums





Ans:A is true but R is false
34 Choose the correct statement




Ans:All species of Spirogyra are freshwater forms
35 [A]: Species of Spirogyra are cosmopolitan in distrubution
[R]: Speies of Spirogyra uniformly distributed in various climatic regions of the world





Ans:A is true but R is false
36 Primordial utricle of Spirogyra cell lacks




Ans:Nucleus
37 Enzymes secreted by Rhizoidal hyphae are




Ans:Hydrolases
38 Study the following table with respect to Rhizoids and choose the correct combination





Ans:I and III
39 [A]: The hyphae of Rhizopus that spread on the surface of substratum are called as Stolons
[R]: The length of the stolon between two adjacent rhizoids emanating points is different from the other two adjacent rhizoids formation points of the same mycelium





Ans:Both A and R are true and R is the correct explanation of A
40 If 54 cells of monoecious filament of Spirogyra are involved in sexual reproduction, the total number of haploid nuclei formed in all zygospores during their germination and number of daughter filaments formed are respectively




Ans:108, 27
41 Rhizopus belongs to class




Ans:Zygomycetes
42 Choose the correct statement




Ans:Some species of Rhizopus are facultative parasites
43 The stages of Rhizopus in correct sequence are




Ans:Bread mould, Pin mould, Black mould
44 The hyphae seen in vegetative stage of Rhizopus are
I. Sporangiophores
II. Stolons
III. Zygophores
IV. Rhizoids





Ans:II and IV
45 The features of Rhizopus hyphae are




Ans:Transparent, Tubular, Coenocytic
46 Rhizopus mycelium absorbs food materials from the substratum in the form of




Ans:Sugars
47 Only during asexual stage Rhizopus can be referred as
I. Weed of the laboratory
II. Bread mould
III. Pin mould
IV. Black mould





Ans:III and IV
48 Sporangiospores of Rhizopus are




Ans:Round and black
49 The structure of Sporagium of Rhizopus that delimits the sporoplasm from columelloplasm is




Ans:Repositories of the cell
50 Columella of Rhizopus is




Ans:Dome shaped
51 These are relatively more persistent structures of asexual hyphae




Ans:Columella
52 The structures of Rhizopus that aid in the discharge of spores from the sporangium are
I. Columella
II. Sporangiophore
III. Stolons





Ans:I and II
53 Hypha of Rhizopus with chlamydospores can be described as




Ans:Multinucleate, Septate, Multicellular
54 Arrange the following events of Sporangiospore formation in correct sequence.
I. Dome shaped arrangement of vacuoles
II. Sporoplasm differentiation IV. Degeneration of nuclei of columella





Ans:II, I, III, IV
55 Choose the correct statement




Ans:Sporangiospores are usually 2-10 nucleated
56 Arrange the following events of sporangiospore formation in correct sequence.
I. Cleft formation
II. Cleavage of soporiferous zone
III. Columelloplasm demarcation
IV. Wall formation around polyhedral pieces





Ans:III, I, II, IV
57 Choose the incorrect statement with respect to sporangiospore formation in Rhizopus




Ans:Vacuoles of soporiferous zone gradually disappear
58 Rhizopus does not show
I. Isogamy
II. Anisogamy
III. Physiological anisogamy
IV. Oogamy





Ans:II and IV
59 A, B, C and D are the mycelia of a species of Rhizopus. Zygospore formation is seen when A is grown along with D. Zygospore formation is noticed when B is grown along with C. When C is with D no such zygospore formatin is not noticed. With respect to the above choose the correct statements
I. Zygospores can be formed when C is grown with A
II. Zygophore formation can be noticed when B is grown with D
III. Zygospores are not formed when B is grown with A
IV. A belong to one type strain and C and D belong to another type of strain





Ans:All except IV
60 Arrange the following events of sexual reproduction in Rhizopus stolonifer in correct sequence.
I. Formation of suspensor
II. Pairing of compatible nuclei
III. Formation of Zygophores
IV. Fusion of gametangia





Ans:III, I, IV, II
61 Choose the wrong statement




Ans:Suspensor and Gametangium have Protoplasmic contact
62 Simultaneous events that occur during sexual reproduction of Rhizopus stolonifer are




Ans:Spliting of zygospore exine, Meiosis in the zygospore
63 Identify the correct sequence of events that occur during germination of Rhizopus Zygospore.
I. formation of meiospores
II. Meiosis
III. Formation of Germ sporangium
IV. Promycelium formation





Ans:II, IV, III, I
64 Match the following





Ans:A - IV, B - III, C - II, D - V
65 [A]: Gametangia of one mycelium of Rhizopus sexualis can not fuse with gamtangia of another mycelium of the same species
[R]: Rhizopus sexualis is not heterothallic





Ans:A is false but R is true
66 A + strain progametangium of Rhizopus stolonifer has 108 nuclei and –strain progametangium 124 nuclei. Upon successful completion of sexual reproduction, there is formation of 224 daughter mycelia. What must be the minimum number of nuclei that each gemetangium is expected to contain.




Ans:56
67 Choose the incorrect set




Ans:Prommycelium – Diploid – Germ sporangium
68 Singly forming hyphae of Rhizopus are
I. Zygophores
II. Sporangiophores
III. Rhizoids
IV. Promycelium





Ans:I and IV
69 [A]: Life cycle of Rhizopus is haplontic
[R]: All stages of Rhizopus life cycle are haploid





Ans:A is true but R is false
70 Non-septate structures of Rhizopus are
I. Promycelium
II. Sporangiophores
III. Progametangium
IV. Rhizoids
V. Stolons





Ans:all except I and IV
71 During sexual reproduction of Rhizopus, degeneration of nuclei is noticed in the following structures.




Ans:Zygospores
72 The following event can not be seen in the life cycle of Rhizopus




Ans:Cell plate formation
73 The structures of Rhizopus that show the degeneration of nuclei are
I. Columella
II. Germ sporangium
III. Young zygospore
IV. Mature zygospore





Ans:I and III
74 Zygophores of Rhizopus are




Ans:Transformed stoloniferous hyphae
75 Apical growth of following structures of Rhizopus is limited




Ans:Promycelium

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