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jyoti

HomeAuthor: jyotiPage 26

Distinct alternation of generation is found in

(a)  Rhizopus                             (b)  Bacteria (c)   Viruses                               (d)  Pteris (Fern) Ans. d   (7)

The site of spore formation in Dryopteris is

(a)  Sorus                                  (b)  Sporophyll (c)   Sporophore                       (d)  Sporangium Ans. d (12)

Kidney- shaped covering of Dryopteris is

(a)  Ramentum                        (b)  Placenta (c)   Indusium                           (d)  Sporophyll Ans. c (7)

Brown hair found at the base of Pteris leaves are

(a)  Modified stipules              (b)  Modified leaflets (c)   Ramenta                            (d)  Spines Ans. c (9)

Neck canal cells in Dryopteris are

(a)  One with two nuclei         (b)  Two (c)   One with one nucleus      (d)  Four Ans. a (7)

Presence of ciliated antherozoids in Dryopteris indicates

(a)  Terrestrial habit               (b)  Aquatic ancestry (c)   Both (a) and (b)               (d)  None of these Ans. b (9)

Which one controls dehiscence of sporangium in Dryopteris

(a)  Annulus                             (b)  Tapetum (c)   Sorus                                  (d)  Indusium Ans. a (8)

In Dryopteris, the antherozoids are

(a)  Biflagellate sickle-shaped (b)  Multiflagellate sickle shaped (c)   Multiflagellate spirally coiled (d)  Biflagellate spirally coiled Ans. c (11)

In Pteridophytes/ Dryopteris meiosis occurs at the time of

(a)  Gamete formation            (b)  Spore formation (c)   Formation of prothallus  (d)  Formation of sex organs Ans. b (9)

In Dryopteris, the sori are borne

(a)  Laterally                            (b)  Abaxially (c)   Adaxially                           (d)  Marginally Ans. b (7)

Placenta in Dryopteris is the place of attachment of

(a)  Ovules                                (b)  Ramenta (c)   Sporangia                          (d)  Archegonia Ans. c (8)

Pteridium possess

(a)  Polycyclic dictyostele (b)  Actinostele (c)   Siphonostele (d)  Amphiphloic siphonostele Ans. a (6)

Two distinct generations in a single life history are common in

(a)  Bacillus                               (b)  Mango (c)   Pteris (Dryopteris)           (d)  Spirogyra Ans. c (10)

Which of the following is not heterosporous

(a)  Dryopteris                         (b)  Selaginella (c)   Marsilea                             (d)  Pinus Ans. a (8)

Multiflagellate male gametes (sperms) are found in

(a)  Chlamydomonas                (b)  Funaria (c)   Dryopteris                         (d)  Riccia Ans. c (5)

Characteristic of fern is

(a)  Circinate vernation (b)  Reticulate venation (c)   Parallel venation (d)  None of these Ans. a (9)

The first plants to appear after a forest fire are the ferns, this is because of the survival of their

(a)  Spores                                (b)  Leaves (c)   Fronds                               (d)  Rhizomes (e)  Both (c) and (d) Ans. d (9)

First vascular plant is

(a)  Thallophyta                       (b)  Bryophyta (c)   Pteridophyta                     (d)  Spermatophyta Ans. c (10)

In pteridophytes, phloem is without

(a)  Sieve cells                          (b)  Sieve tubes (c)   Companion cells                (d)  Both (b) and (c) Ans. c   (9)

Ectophloic siphonostele is found in

(a)  Adiantum and Cucurbitaceae (b)  Osmunda and Equisetum (c)   Marsilea and Botrychium (d)  Dicksoni and Maidenhair fern Ans. b (5)

Monoecious condition is found in

(a)  Cycas                                  (b)  Selaginella (c)   Pinus                                  (d)  Pteridium Ans. d (8)

A fern prothallus is bisexual. If fertilization takes place between their gametes then it is known as

(a)  Cros fertilization               (b)  Self fertilization (c)   Isogamous                         (d)  Viviparous Ans. b (9)

Which is the most important group on earth

(a)  Mosses                               (b)  Tracheophyta (c)   Bryophyta                         (d)  Liverworts Ans. b (9)

During fertilization in ferns, male gamete reaches the female gamete through the agency of

(a)  Water                                 (b)  Insects (c)   Chemicals                          (d)  Winds Ans. a (10)

To which of the groups would you assign plant which has a vascular supply, lacks ovules and reproduces by means of spores

(a)  Gymnosperms                   (b)  Thallophyta (c)   Bryophyta                         (d)  Pteridophyta Ans. d (7)

Female gametophyte in heterosporous ferns is

(a)  Archegonium                    (b)  Protonema (c)   Prothallus                          (d)  Megasporangium Ans. c     (8)

Disposal of spores in fern takes place through

(a)  Annulus                             (b)  Stomium (c)   Both (a) and (b)               (d)  Indusium Ans. c (7)

Protonema stage is found in

(a)  Ferns                                  (b)  Mosses (c)   Liverworts                         (d)  Fungi Ans. a (11)

Most primitive members in which roots not present is

(a)  Psilotum                             (b)  Rhynia (c)   Leycopodium                     (d)  Selaginella Ans. b (10)

Which pteridophyte is called as horse-tail

(a)  Equisetum                          (b)  Lycopodium (c)   Marsilea                             (d)  Selaginella Ans. a (7)

The gametophyte of fern bears

(a)  True roots                         (b)  Antheridia (c)   Archegonia                        (d)  Both (b) and (c) Ans. d (8)

The cells of fern prothallus contains nucleus with

(a)  4n chromosomes              (b)  3n chromosomes (c)   2n chromosomes              (d)  n chromosomes Ans. d (12)

The circinate venation is the characteristic feature of ferns. It refers to

(a)  Coiling of young leaves (b)  Arrangement of leaves on stem (c)   Attachment of sori on leaves (d)  Heterophilly Ans....

Heart shaped prothallus of fern bears

(a)  Male sex organs                (b)  Female sex organs (c)   Bisexual                             (d)  None of these Ans. c (17)

Mosses and ferns are found in moist and shady places because both

(a)  Require presence of water for fertilization (b)  Do not need sunlight for photosynthesis (c)   Depend for their nutrition on...

Jacket of fern antheridium is composed of

(a)  2 cells                                 (b)  3 cells (c)   4 cells                                 (d)  5 cells Ans. b (8)

Nephrolepis is a

(a)  Bryophyte                         (b)  Pteridophyte (c)   Gymnosperm                    (d)  Angiosperm Ans. b (12)

Common characteristic between bryophytes and pteridophytes is

(a)  Vascularisation                 (b)  Terrestrial habit (c)   Water for fertilization      (d)  Independent sporophyte Ans. c (16)

The number of spores in the sporangium of fern is

(a)  16                                       (b)  32 (c)   64                                       (d)  128 Ans. c (12)

Fern plant is a

(a)  Haploid gametophyte      (b)  Diploid gametophyte (c)   Diploid sporophyte          (d)  Haploid sporophyte Ans. c (12)
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